Dvir Kafri

I guess I didn't think to scroll through that whole list at the front page. When I searched "Moment" in the search bar I did not see the link to...

It becomes somewhat cumbersome, since I usually want to use `CircuitOperation.replace`, and then I have to worry about keeping track of whether I need to use the untagged op or...

> @mathe-matician - thanks for volunteering to help! > > @dkafri - I wonder if it would work to add some `replace_untagged(self, transform: Callable[Operation, Operation])` convenience helper to the Operation...

> tbh I'd consider removing immutability from the next version of Cirq. Immutability is nice for lots of things, but I don't feel like it's providing all that much value...