code: def add_cli_clear_bel_namespace(main: click.Group) -> click.Group:  # noqa: D202
      
  
      @main.command()
      @click.pass_obj
      def drop(manager: BELNamespaceManagerMixin):
          """Clear names/identifiers to terminology store."""
          namespace = manager.drop_bel_namespace()
  
          if namespace:
              click.echo(f'namespace {namespace} was cleared')
  
      return main
docs: Add a ``clear_bel_namespace`` command to main :mod:`click` function.