async def get(self,request_configuration: Optional[RequestConfiguration[UnifiedGroupSourceItemRequestBuilderGetQueryParameters]] = None) -> Optional[UnifiedGroupSource]:
        """
        Data source entity for groups associated with the custodian.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[UnifiedGroupSource]
        """
        request_info = self.to_get_request_information(
            request_configuration
        )
        from .........models.o_data_errors.o_data_error import ODataError

        error_mapping: dict[str, type[ParsableFactory]] = {
            "XXX": ODataError,
        }
        if not self.request_adapter:
            raise Exception("Http core is null") 
        from .........models.security.unified_group_source import UnifiedGroupSource

        return await self.request_adapter.send_async(request_info, UnifiedGroupSource, error_mapping)

        Data source entity for groups associated with the custodian.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[UnifiedGroupSource]
        
msgraph/generated/security/cases/ediscovery_cases/item/custodians/item/unified_group_sources/item/unified_group_source_item_request_builder.py