def by_data_source_id(self,data_source_id: str) -> DataSourceItemRequestBuilder:
        """
        Provides operations to manage the custodianSources property of the microsoft.graph.security.ediscoverySearch entity.
        param data_source_id: The unique identifier of dataSource
        Returns: DataSourceItemRequestBuilder
        """
        if data_source_id is None:
            raise TypeError("data_source_id cannot be null.")
        from .item.data_source_item_request_builder import DataSourceItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["dataSource%2Did"] = data_source_id
        return DataSourceItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the custodianSources property of the microsoft.graph.security.ediscoverySearch entity.
        param data_source_id: The unique identifier of dataSource
        Returns: DataSourceItemRequestBuilder
        
msgraph/generated/security/cases/ediscovery_cases/item/searches/item/custodian_sources/custodian_sources_request_builder.py