DefaultCodeToLevel is the default implementation of gRPC return codes and interceptor log level for server side.

HandleRecoverError return recovery error when grpc occur panic.

JWTFromIncomingContext extracts the token from the incoming context which `ParseTokenFunc` used default token parser.

UseContextLogger replace the default context logger with grpc context logger.

WrapServerStream returns a ServerStream that has the ability to overwrite context.

ServerField is used in every server-side log statement made through grpc_zap.Can be overwritten before initialization.

WrappedServerStream is a thin wrapper around grpc.ServerStream that allows modifying context.

ValuesExtractor defines a function for extracting values (keys/tokens) from the given context.