mutate signature for optimistic updates?

[SevenOutman]

While there's example of making optimistic update with two separate mutate calls, why not add a new mutate signature to act as a shortcut?

mutate(newUser, updateUser(newUser), false)

// Equivalent to

mutate(newUser, false)
mutate(updateUser(newUser), false)

[shuding]

Related to #1729, an option can be added to make it available:

mutate(updateUser(newUser), {
  optimisticData: newUser
})

I think in general, for advanced use cases explicit option names are better than conventions (the order of parameters) for people to remember.

(Not sure about the name optimisticData though.)

[SevenOutman]

I think in general, for advanced use cases explicit option names are better than conventions (the order of parameters) for people to remember.

That makes sense to me.

[shuding]

Would be great if you can give #1745 a look!