# Package org.hibernate.search.spi.impl

- Interface Summary
  Interface | Description
  --- | ---
  ExtendedSearchIntegratorWithShareableState | Contract for `ExtendedSearchIntegrator` implementors exposing its shareable state.
  SearchFactoryState | Represents the sharable state of a search factory

- Class Summary
  Class | Description
  --- | ---
  IndexedTypeMaps |
  IndexedTypeSets |
  PojoIndexedTypeIdentifier |
  TypeHierarchy | Helper class which keeps track of all super classes and interfaces of known entities.

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