pub fn sync<ORD>(
y: GroupCrdtState<MemberId, MessageId, Conditions, ORD>,
ops: &[TestOperation],
) -> GroupCrdtState<MemberId, MessageId, Conditions, ORD>where
ORD: Orderer<MemberId, MessageId, GroupControlMessage<MemberId, Conditions>, Operation = TestOperation> + Debug,
ORD::Operation: Clone,