Tooling: Extension from where?

[Thorium]

The tooltip so nicely shows that this is an (extension), but I have no idea what namespace open I should add to replicate the code sample:

So I wonder would it be possible to add "from where" to the tooltip?

This could help specifically when you have incorrect open and try to understand why you have 3 parameters and the sample code has 2.

[Thorium]

Even worse, pressing F12 over the extension method takes you to incorrect place.

[T-Gro]

Any idea where it should go? Since it can resolve to a longer namespace identifier, I don't think placing it right inside of the (extension from ..) remark would be wise.