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Most case including usage as per the documentation (see examples example in preceding sections Motivation) no changes would be required, although users should be encouraged to add type parameters to the previously used raw types to get rid of compilation warnings or to remove @SupressWarnings annotations.

However, some mechanical changes will would be required if StateStoreSupplier type parameterised with the raw SessionStore type was used in a cast, for instance. See: KGroupedStreamImplTest.java#L98

Another case where changes are needed would be if results of PersistentKeyValueFactory .sessionWindowed() or .windowed() or results of calls to enableLogging(), disableLogging(), enableCaching() on return values of .sessionWindowed() or .windowed() were assigned to a variable, field or used as a parameter. In that case the type of the variable, field or parameter would need changing from PersistentKeyValueFactory to PersistentSessionFactory<K, V> or PersistentWindowFactory<K, V> respectively.

To make that migration straightforward upgrade note shall be provided in the documentation.

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