code: def _playbook_arguments(self):
          
  
          self.add_argument(
              '--tc_playbook_db_type', default=self._tc_playbook_db_type, help='Playbook DB type'
          )
          self.add_argument(
              '--tc_playbook_db_context',
              default=self._tc_playbook_db_context,
              help='Playbook DB Context',
          )
          self.add_argument(
              '--tc_playbook_db_path', default=self._tc_playbook_db_path, help='Playbook DB path'
          )
          self.add_argument(
              '--tc_playbook_db_port', default=self._tc_playbook_db_port, help='Playbook DB port'
          )
          self.add_argument(
              '--tc_playbook_out_variables', help='Playbook output variables', required=False
          )
docs: Argument specific to playbook apps.
  
          These arguments will be passed to every playbook app by default.
  
          --tc_playbook_db_type type        The DB type (currently on Redis is supported).
          --tc_playbook_db_context context  The playbook context provided by TC.
          --tc_playbook_db_path path        The DB path or server name.
          --tc_playbook_db_port port        The DB port when required.
          --tc_playbook_out_variables vars  The output variable requested by downstream apps.