async def get(self,request_configuration: Optional[RequestConfiguration[FunctionsRequestBuilderGetQueryParameters]] = None) -> Optional[FunctionsGetResponse]:
        """
        List all the functions currently supported in the attributeMappingSource.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[FunctionsGetResponse]
        Find more info here: https://learn.microsoft.com/graph/api/synchronization-synchronizationschema-functions?view=graph-rest-1.0
        """
        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 .functions_get_response import FunctionsGetResponse

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

        List all the functions currently supported in the attributeMappingSource.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[FunctionsGetResponse]
        Find more info here: https://learn.microsoft.com/graph/api/synchronization-synchronizationschema-functions?view=graph-rest-1.0
        
msgraph/generated/applications/item/synchronization/jobs/item/schema/functions/functions_request_builder.py