List of enhancements that didn't make it into 8.0:

• Transaction support.
• Verify locks are acquired for all operations (once tx is in place, locks can be checked easily)
• Complete persistence support (remove many returning previous, put many returning previous, remove many)
• Replication of per-invocation parameters.
• Port mode *Becoming*Test to functional APIs, and expand on testing other functional APIs.
• Test interoperability with cache, e.g. cache put with lifespan can be retrieved via functional map with lifespan, and viceversa
• Test compatibility mode
• Add more listener events: activation, passivation and expiration.
• Use check isLocal instead of `e == null` in command impls
• Fix branch skip issue (see previous PR: https://github.com/infinispan/infinispan/pull/3571)
• Add externalizers for primitive versions of Optional.
• ValueMatcherMode indexes in MarshallableFunctionExternalizers should be based on ordinal() calls to annotation. Also, could the core's enumeration use the annotations defined in commons?
• Add AdvancedExternalizer version for functions that takes value matcher
• Complete support for MetaCreated and MetaLastUsed (which should be separated into MetaLastModified and MetaLastAccessed)