add new reportImplicitAbstractClass diagnostic rule

[DetachHead]

fixes #109

• add this rule to the playground

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

paasta (https://github.com/yelp/paasta)
+   /tmp/mypy_primer/projects/paasta/paasta_tools/smartstack_tools.py:480:7 - error: Class "BaseReplicationChecker" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "BaseReplicationChecker.get_allowed_locations_and_hosts" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/paasta/paasta_tools/metrics/metrics_lib.py:166:7 - error: Class "Counter" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "GaugeProtocol.set" is not implemented (reportImplicitAbstractClass)
- 24365 errors, 0 warnings, 0 notes
+ 24367 errors, 0 warnings, 0 notes

psycopg (https://github.com/psycopg/psycopg)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/adapt.py:140:7 - error: Class "RecursiveDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/adapt.py:148:7 - error: Class "RecursiveLoader" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Loader.load" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/array.py:38:7 - error: Class "BaseListDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/composite.py:86:7 - error: Class "SequenceDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/composite.py:162:7 - error: Class "BaseCompositeLoader" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Loader.load" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/datetime.py:60:7 - error: Class "_BaseTimeDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/datetime.py:133:7 - error: Class "_BaseDatetimeDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/multirange.py:184:7 - error: Class "BaseMultirangeDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/multirange.py:294:7 - error: Class "BaseMultirangeLoader" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Loader.load" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/net.py:68:7 - error: Class "_AIBinaryDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/net.py:122:7 - error: Class "_LazyIpaddressLoader" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Loader.load" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/range.py:288:7 - error: Class "BaseRangeDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/range.py:455:7 - error: Class "BaseRangeLoader" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Loader.load" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/psycopg/psycopg/psycopg/types/string.py:22:7 - error: Class "_BaseStrDumper" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Dumper.dump" is not implemented (reportImplicitAbstractClass)
- 39484 errors, 0 warnings, 0 notes
+ 39498 errors, 0 warnings, 0 notes

pytest (https://github.com/pytest-dev/pytest)
+   /tmp/mypy_primer/projects/pytest/src/_pytest/capture.py:342:7 - error: Class "SysCaptureBase" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "CaptureBase.writeorg" is not implemented
+     "CaptureBase.snap" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/pytest/src/_pytest/capture.py:444:7 - error: Class "FDCaptureBase" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "CaptureBase.writeorg" is not implemented
+     "CaptureBase.snap" is not implemented (reportImplicitAbstractClass)
- 17847 errors, 0 warnings, 0 notes
+ 17849 errors, 0 warnings, 0 notes

ibis (https://github.com/ibis-project/ibis)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/__init__.py:621:7 - error: Class "CanCreateCatalog" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "CanListCatalog.list_catalogs" is not implemented
+     "CanCreateCatalog.create_catalog" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/__init__.py:707:7 - error: Class "CanCreateDatabase" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "CanListDatabase.list_databases" is not implemented
+     "CanCreateDatabase.create_database" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/impala/ddl.py:553:7 - error: Class "CreateFunction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Base.compile" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/sql/__init__.py:28:7 - error: Class "SQLBackend" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "BaseBackend.list_tables" is not implemented
+     "BaseBackend.version" is not implemented
+     and 2 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/sql/ddl.py:86:7 - error: Class "DML" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Base.dialect" is not implemented
+     "Base.compile" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/sql/ddl.py:90:7 - error: Class "DDL" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Base.dialect" is not implemented
+     "Base.compile" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/sql/ddl.py:94:7 - error: Class "CreateDDL" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Base.dialect" is not implemented
+     "Base.compile" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/sql/ddl.py:99:7 - error: Class "DropObject" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Base.dialect" is not implemented
+     "Base.format_dtype" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/sql/ddl.py:109:7 - error: Class "DropFunction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Base.dialect" is not implemented
+     "Base.format_dtype" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/ibis/ibis/backends/tests/base.py:330:7 - error: Class "ServiceBackendTest" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "BackendTest.deps" is not implemented
+     "BackendTest.connect" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
- 112675 errors, 0 warnings, 0 notes
+ 112685 errors, 0 warnings, 0 notes

sympy (https://github.com/sympy/sympy)
+   /tmp/mypy_primer/projects/sympy/sympy/physics/biomechanics/musculotendon.py:102:7 - error: Class "MusculotendonBase" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "MusculotendonBase.curves" is not implemented (reportImplicitAbstractClass)
- 597274 errors, 0 warnings, 0 notes
+ 597275 errors, 0 warnings, 0 notes

mongo-python-driver (https://github.com/mongodb/mongo-python-driver)
+   /tmp/mypy_primer/projects/mongo-python-driver/bson/codec_options.py:91:7 - error: Class "TypeCodec" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "TypeDecoder.transform_bson" is not implemented
+     "TypeEncoder.transform_python" is not implemented (reportImplicitAbstractClass)
- 52096 errors, 0 warnings, 0 notes
+ 52097 errors, 0 warnings, 0 notes

scikit-learn (https://github.com/scikit-learn/scikit-learn)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/naive_bayes.py:521:7 - error: Class "_BaseDiscreteNB" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "_BaseNB._joint_log_likelihood" is not implemented
+     "_BaseDiscreteNB._count" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/ensemble/_voting.py:48:7 - error: Class "_BaseVoting" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "_BaseHeterogeneousEnsemble.__init__" is not implemented
+     "_BaseVoting.fit" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/feature_selection/_univariate_selection.py:525:7 - error: Class "_BaseFilter" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "SelectorMixin._get_support_mask" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/gaussian_process/kernels.py:678:7 - error: Class "KernelOperator" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Kernel.__call__" is not implemented
+     "Kernel.diag" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/linear_model/_stochastic_gradient.py:1388:7 - error: Class "BaseSGDRegressor" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "BaseSGDRegressor.__init__" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/model_selection/_search_successive_halving.py:65:7 - error: Class "BaseSuccessiveHalving" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "BaseSuccessiveHalving._generate_candidate_params" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/scikit-learn/sklearn/utils/_param_validation.py:234:7 - error: Class "RealNotInt" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "Complex.__add__" is not implemented
+     "Complex.__radd__" is not implemented
+     and 21 more... (reportImplicitAbstractClass)
- 208046 errors, 0 warnings, 0 notes
+ 208053 errors, 0 warnings, 0 notes

pyppeteer (https://github.com/pyppeteer/pyppeteer): 1.95x faster (25.3s -> 13.0s in a single noisy sample)

black (https://github.com/psf/black)
+   /tmp/mypy_primer/projects/black/src/black/trans.py:1065:7 - error: Class "BaseStringSplitter" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "StringTransformer.do_transform" is not implemented
+     "BaseStringSplitter.do_splitter_match" is not implemented (reportImplicitAbstractClass)
- 1444 errors, 0 warnings, 0 notes
+ 1445 errors, 0 warnings, 0 notes

bokeh (https://github.com/bokeh/bokeh)
+   /tmp/mypy_primer/projects/bokeh/src/bokeh/command/subcommands/file_output.py:55:7 - error: Class "FileOutputSubcommand" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "FileOutputSubcommand.file_contents" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/bokeh/tests/unit/bokeh/command/test_subcommand.py:29:7 - error: Class "_Bad" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Subcommand.invoke" is not implemented (reportImplicitAbstractClass)
- 30084 errors, 0 warnings, 0 notes
+ 30086 errors, 0 warnings, 0 notes

stone (https://github.com/dropbox/stone)
+   /tmp/mypy_primer/projects/stone/stone/backend.py:353:7 - error: Class "CodeBackend" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Backend.generate" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/stone/stone/backends/obj_c.py:38:7 - error: Class "ObjCBaseBackend" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Backend.generate" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/stone/stone/backends/swift.py:89:7 - error: Class "SwiftBaseBackend" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Backend.generate" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/stone/stone/backends/python_rsrc/stone_validators.py:124:7 - error: Class "Primitive" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Validator.validate" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/stone/stone/backends/python_rsrc/stone_validators.py:414:7 - error: Class "Composite" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Validator.validate" is not implemented (reportImplicitAbstractClass)
- 17013 errors, 0 warnings, 0 notes
+ 17018 errors, 0 warnings, 0 notes

kopf (https://github.com/nolar/kopf)
+   /tmp/mypy_primer/projects/kopf/kopf/_kits/runner.py:20:11 - error: Class "_AbstractKopfRunner" is implicitly a `Protocol` because it extends a `Protocol` without implementing all abstract symbols. If this is intentional, add `Protocol` or `ABC` to its base classes, or use `metaclass=ABCMeta`.
+     "AbstractContextManager.__exit__" is not implemented (reportImplicitAbstractClass)
- 24272 errors, 0 warnings, 0 notes
+ 24273 errors, 0 warnings, 0 notes

prefect (https://github.com/PrefectHQ/prefect)
+   /tmp/mypy_primer/projects/prefect/src/prefect/_internal/concurrency/services.py:296:7 - error: Class "BatchedQueueService" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "BatchedQueueService._handle_batch" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:267:7 - error: Class "EmitEventAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "EmitEventAction.create_event" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:281:7 - error: Class "ExternalDataAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:373:7 - error: Class "JinjaTemplateAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:615:7 - error: Class "DeploymentAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:660:7 - error: Class "DeploymentCommandAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "DeploymentCommandAction.command" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:968:7 - error: Class "FlowRunAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:987:7 - error: Class "FlowRunStateChangeAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "FlowRunStateChangeAction.new_state" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:1290:7 - error: Class "WorkPoolAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:1335:7 - error: Class "WorkPoolCommandAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "WorkPoolCommandAction.command" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:1424:7 - error: Class "WorkQueueAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:1469:7 - error: Class "WorkQueueCommandAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "WorkQueueCommandAction.command" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:1543:7 - error: Class "AutomationAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "Action.act" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/prefect/src/prefect/server/events/actions.py:1588:7 - error: Class "AutomationCommandAction" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AutomationCommandAction.command" is not implemented (reportImplicitAbstractClass)
- 85901 errors, 0 warnings, 0 notes
+ 85915 errors, 0 warnings, 0 notes

core (https://github.com/home-assistant/core)
+   /tmp/mypy_primer/projects/core/homeassistant/components/airzone_cloud/binary_sensor.py:159:7 - error: Class "AirzoneBinarySensor" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AirzoneEntity.get_airzone_value" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/airzone_cloud/climate.py:175:7 - error: Class "AirzoneClimate" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AirzoneEntity.get_airzone_value" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/airzone_cloud/climate.py:238:7 - error: Class "AirzoneDeviceClimate" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AirzoneEntity.get_airzone_value" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/airzone_cloud/climate.py:334:7 - error: Class "AirzoneDeviceGroupClimate" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AirzoneEntity.get_airzone_value" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/airzone_cloud/select.py:75:7 - error: Class "AirzoneBaseSelect" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AirzoneEntity.get_airzone_value" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/airzone_cloud/sensor.py:272:7 - error: Class "AirzoneSensor" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AirzoneEntity.get_airzone_value" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/ambient_network/entity.py:16:7 - error: Class "AmbientNetworkEntity" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AmbientNetworkEntity._update_attrs" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/assist_satellite/entity.py:102:7 - error: Class "AssistSatelliteEntity" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AssistSatelliteEntity.async_get_configuration" is not implemented
+     "AssistSatelliteEntity.async_set_configuration" is not implemented
+     and 1 more... (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/august/entity.py:23:7 - error: Class "AugustEntity" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AugustEntity._update_from_data" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/august/entity.py:90:7 - error: Class "AugustDescriptionEntity" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AugustEntity._update_from_data" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/axis/entity.py:85:7 - error: Class "AxisEventEntity" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.
+     "AxisEventEntity.async_event_callback" is not implemented (reportImplicitAbstractClass)
+   /tmp/mypy_primer/projects/core/homeassistant/components/blue_current/entity.py:15:7 - error: Class "BlueCurrentEntity" is implicitly abstract because it extends an abstract class without implementing all abstract symbols. If this is intentional, add `ABC` to its base classes or use `metaclass=ABCMeta`.

... (truncated 570 lines) ...```