Export Reference-related utilities from @apollo/client.

When writing custom read and merge functions, it's useful to be able to
annotate the existing and incoming parameters with the Reference type,
rather than relying on the toReference and isReference helpers.

src/__tests__/ApolloClient.ts

@@ -1,7 +1,7 @@
 import gql from 'graphql-tag';
 
 import { Observable } from '../utilities/observables/Observable';
-import { makeReference } from '../utilities/graphql/storeUtils';
+import { makeReference } from '../core';
 import { ApolloLink } from '../link/core/ApolloLink';
 import { HttpLink } from '../link/http/HttpLink';
 import { InMemoryCache } from '../cache/inmemory/inMemoryCache';

src/__tests__/optimistic.ts

@@ -8,7 +8,7 @@ import { MutationQueryReducersMap } from '../core/types';
 import { Subscription } from '../utilities/observables/Observable';
 import { ApolloClient } from '../';
 import { addTypenameToDocument } from '../utilities/graphql/transform';
-import { makeReference } from '../utilities/graphql/storeUtils';
+import { makeReference } from '../core';
 import { stripSymbols } from '../utilities/testing/stripSymbols';
 import { itAsync } from '../utilities/testing/itAsync';
 import { InMemoryCache } from '../cache/inmemory/inMemoryCache';

src/cache/inmemory/__tests__/cache.ts

@@ -2,7 +2,7 @@ import gql, { disableFragmentWarnings } from 'graphql-tag';
 
 import { stripSymbols } from '../../../utilities/testing/stripSymbols';
 import { cloneDeep } from '../../../utilities/common/cloneDeep';
-import { makeReference } from '../../../utilities/graphql/storeUtils';
+import { makeReference } from '../../../core';
 import { InMemoryCache, InMemoryCacheConfig } from '../inMemoryCache';
 
 disableFragmentWarnings();

src/cache/inmemory/__tests__/diffAgainstStore.ts

@@ -1,6 +1,6 @@
 import gql, { disableFragmentWarnings } from 'graphql-tag';
 
-import { Reference, makeReference } from '../../../utilities/graphql/storeUtils';
+import { Reference, makeReference } from '../../../core';
 import { defaultNormalizedCacheFactory } from '../entityStore';
 import { StoreReader } from '../readFromStore';
 import { StoreWriter } from '../writeToStore';

src/cache/inmemory/__tests__/policies.ts

@@ -2,7 +2,7 @@ import gql from "graphql-tag";
 import { InMemoryCache } from "../inMemoryCache";
 import { StoreValue } from "../../../utilities";
 import { FieldPolicy, Policies } from "../policies";
-import { Reference } from "../../../utilities/graphql/storeUtils";
+import { Reference } from "../../../core";
 
 function reverse(s: string) {
   return s.split("").reverse().join("");

src/cache/inmemory/__tests__/readFromStore.ts

@@ -4,7 +4,7 @@ import gql from 'graphql-tag';
 import { stripSymbols } from '../../../utilities/testing/stripSymbols';
 import { StoreObject } from '../types';
 import { StoreReader } from '../readFromStore';
-import { makeReference } from '../../../utilities/graphql/storeUtils';
+import { makeReference } from '../../../core';
 import { defaultNormalizedCacheFactory } from '../entityStore';
 import { withError } from './diffAgainstStore';
 import { Policies } from '../policies';

src/core/__tests__/QueryManager/links.ts

@@ -11,7 +11,7 @@ import { MockSubscriptionLink } from '../../../utilities/testing/mocking/mockSub
 
 // core
 import { QueryManager } from '../../QueryManager';
-import { Reference } from '../../../utilities/graphql/storeUtils';
+import { Reference } from '../../../core';
 
 describe('Link interactions', () => {
   it('includes the cache on the context for eviction links', done => {

src/core/index.ts

@@ -71,6 +71,11 @@ export { ServerError, throwServerError } from '../link/utils/throwServerError';
 
 export { Observable } from '../utilities/observables/Observable';
 export { getMainDefinition } from '../utilities/graphql/getFromAST';
+export {
+  Reference,
+  isReference,
+  makeReference,
+} from '../utilities/graphql/storeUtils';
 
 /* Supporting */