[Feature request] Type and parameter inlay-hints

[GrayJack]

A hint that shows the type in front of a variable when omitted.
A hind of the parameter name in a function call.

I saw the first on VS Code and IntelliJ and thought that that are neat.
The second one I only saw in IntelliJ.

Examples

How feasible are this feature?

[GrayJack]

With RA supporting inlay hints, will in theory be possible to implement this with the state that the libraries/packages are?

Or it's a limitation of atom-languageclient | atom-ide API?