GRPC_SESSION_ATTR_DESTRUCT_NP - Destructs session attributes.
INTEGER FUNCTION GRPC_SESSION_ATTR_DESTRUCT_NP(ATTR)
INTEGER(KIND=8) ATTRThe GRPC_SESSION_ATTR_DESTRUCT_NP() function destructs session attributes.
This function is MT-safe.
If successful, GRPC_NO_ERROR is returned. In the case of an error, Error code is returned.
  GRPC_NOT_INITIALIZED  GRPC_OTHER_ERROR_CODE