async def get(self,request_configuration: Optional[RequestConfiguration[PrincipalRequestBuilderGetQueryParameters]] = None) -> Optional[DirectoryObject]:
        """
        References the principal that's in the scope of this membership or ownership assignment request to the group that's governed through PIM. Supports $expand and $select nested in $expand for id only.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[DirectoryObject]
        """
        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.directory_object import DirectoryObject

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

        References the principal that's in the scope of this membership or ownership assignment request to the group that's governed through PIM. Supports $expand and $select nested in $expand for id only.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[DirectoryObject]
        
msgraph/generated/identity_governance/privileged_access/group/assignment_schedules/item/principal/principal_request_builder.py