These changes are not needed after using RsImportHelper?

Not needed now

There is a one corner case where this doesn't work: a module can be declared inside a function: ```rust fn bar() { // <- constant should not be suggested here mod foo { fn foo() { let a = 2+2; } } } ``` but if I declare a constant inside a function `bar`, I can't use it inside module `foo` :shrug:

Maybe "Choose scope to introduce constant" (more close to java's version) 

Well, let's use the usual IntelliJ UI for this for now and drop these comments. Highlight a position with comments is an interesting idea. Something like inlay hints maybe even better :thinking:

Looks like ` ?: 0` is impossible, but it can leads to fun bugs if it will become possible somehow in the future. Maybe it's better to fail explicitly `?: error("Impossible because we just created a constant with a name")`

```suggestion val (insertedConstent, replaced) = project.runWriteCommandAction { ``` (just to make the code a bit easier to understand)

Looks like a wrong message

Try to use `RsImportHelper.importElements`