Support the key with viewModel

[allen-hsu]

Is your feature request related to a problem? Please describe.
Hi, because the ViewModel provider has the function (ViewModelProvider.get(key, clazz)) that can let you pass the key to ViewModel provide in order to get a different ViewModel with a different key, I want to raise this PR, and according to this :
#213.

Describe the solution you'd like
Add the key variable to every get ViewModel function. like this PR #1373

[arnaudgiuliani]

Yes can be interesting. But from the Koin perspective, you can use a qualifier that do the same. Could it answer you case?

[heitor-gia]

@arnaudgiuliani I believe a qualifier would not be able to do the same once you could use multiple instances of the same ViewModel class for different views simultaneously, attaching them by a key.

This answer #782 (comment) used to work in previous versions, but probably the library's internal logic has changed since then.

Adding the possibility of setting a key to creating multiple instances from a single definition would help a lot in cases where you have multiple stateful components that share the same type o ViewModel in a list, like in a feed, for example.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[arnaudgiuliani]

this has been fixed for API in 3.4