It looks like most places we use an EntityMetaDataAccessor in place of an EntityPrefetcher.
We could consider merging these to simplify code.
Example from Per RepositoryWiring:
'EntityPrefetcher' => function (
PerRepositoryServiceContainer $services,
GenericServices $genericServices
) {
$prefetcher = $services->getService( 'WikiPageEntityMetaDataAccessor' );
Assert::postcondition(
$prefetcher instanceof EntityPrefetcher,
'The WikiPageEntityMetaDataAccessor service is expected to implement EntityPrefetcher interface.'
);
return $prefetcher;
},