def external_columns(self) -> ExternalColumnsRequestBuilder:
        """
        Provides operations to manage the externalColumns property of the microsoft.graph.site entity.
        """
        from .external_columns.external_columns_request_builder import ExternalColumnsRequestBuilder

        return ExternalColumnsRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to manage the externalColumns property of the microsoft.graph.site entity.
        
msgraph/generated/sites/item/site_item_request_builder.py