Quick Fix options for implementing individual default members

Currently there's a quick fix to add implementations for all default members (think trait impl). This is pretty awkward when you only want to add an override for one of them as it will implement all of them (which could be a ton of code) and then you need to figure out which of the ones it added you didn't actually want (i.e. you need to distinguish between three sets: (1) things that were already there, (2) new things that you actually want to change and (3) new things that you want to keep default).

Ideally (I think) the quick fix menu would include one item for each of the default members to add just the implementation of that.

For Intellij (in Java) I would've done this using the "Override methods" action. Here's a clip of that UI:

Start by locating the quick fix that adds implementations for all default members and trace how its available actions are constructed. Add separate actions for individual default members, then verify that selecting one adds only that implementation while preserving the existing behavior for the all-members action.