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Unify the insert and reserve operations into a single code path. This makes the implementation of
Store
simpler, at the cost of making its use a bit more complicated. I think this is a good trade-off, for two reasons:Store
only indirectly throughInsert
(Make use ofInsert
trait pervasively #1377 recently completed this migration).Despite the simplification, we unfortunately end up with more code here, due to lots of repetitive code in the
Store
wrappers. I believe that the prototyping work I mentioned above will result in those wrappers to become simpler, removing all that repetitive code, so I'm fine with that too.