refs(OperationRef[T] | Sequence[OperationRef[T]]): A single OperationRef or a sequence of OperationRefs.
T | list[T]: The result(s) from the operation(s).
Exception: Any exception raised by the underlying operation(s).
Block for one or more OperationRefs and return results.
refs (OperationRef[T] | Sequence[OperationRef[T]]): A single OperationRef or a sequence of OperationRefs.T | list[T]: The result(s) from the operation(s).Exception: Any exception raised by the underlying operation(s).