Use cached value for type safety check during unpacking of Any message (#5698)
Use cached value for type safety check during unpacking of Any message (#5698)

This performance optimization allows to skip reflection (in the is() method) when the message has been already unpacked once
google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf