docs: def global_variable_is_editable(self, gv_name, intro_message='edit'):
          """Check whether global variable is locked
  
          :param str gv_name: Name of global variable to be checked
          :param str intro_message: Message which is used form a useful logger error message if needed
          :return:
          """
          if self.model.global_variable_manager.is_locked(gv_name):
              logger.error("{1} of global variable '{0}' is not possible, as it is locked".format(gv_name, intro_message))
              return False
          return True