grpc_arg_stack_destruct - Destructs a stack
  int grpc_arg_stack_destruct(grpc_arg_stack_t *stack)
  grpc_arg_stack *stackThe grpc_arg_stack_destruct() function destructs a stack.
This function is MT-safe.
Returns 0 if successful. Returns -1 in the event of an error.
  GRPC_NOT_INITIALIZED  GRPC_OTHER_ERROR_CODE