def by_unified_group_source_id(self,unified_group_source_id: str) -> UnifiedGroupSourceItemRequestBuilder:
        """
        Provides operations to manage the unifiedGroupSources property of the microsoft.graph.security.ediscoveryCustodian entity.
        param unified_group_source_id: The unique identifier of unifiedGroupSource
        Returns: UnifiedGroupSourceItemRequestBuilder
        """
        if unified_group_source_id is None:
            raise TypeError("unified_group_source_id cannot be null.")
        from .item.unified_group_source_item_request_builder import UnifiedGroupSourceItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["unifiedGroupSource%2Did"] = unified_group_source_id
        return UnifiedGroupSourceItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the unifiedGroupSources property of the microsoft.graph.security.ediscoveryCustodian entity.
        param unified_group_source_id: The unique identifier of unifiedGroupSource
        Returns: UnifiedGroupSourceItemRequestBuilder
        
msgraph/generated/security/cases/ediscovery_cases/item/custodians/item/unified_group_sources/unified_group_sources_request_builder.py