async def get(self,request_configuration: Optional[RequestConfiguration[RoleAssignmentScheduleRequestsRequestBuilderGetQueryParameters]] = None) -> Optional[UnifiedRoleAssignmentScheduleRequestCollectionResponse]:
        """
        Requests for active role assignments to principals through PIM.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[UnifiedRoleAssignmentScheduleRequestCollectionResponse]
        """
        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.unified_role_assignment_schedule_request_collection_response import UnifiedRoleAssignmentScheduleRequestCollectionResponse

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

        Requests for active role assignments to principals through PIM.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[UnifiedRoleAssignmentScheduleRequestCollectionResponse]
        
msgraph/generated/role_management/entitlement_management/role_assignment_schedule_requests/role_assignment_schedule_requests_request_builder.py