Accessing group within a SmartApp

Discussed already in many variations…
Just a few examples…

NB: Like Windows and Linux, the latter discussions mention that Thing should have the ability to appear in multiple places via Shortcuts (soft tiles), with a view selectable for each shortcut. This is but only one possible way to implement the ability for a Thing to be in more than one Group. Meanwhile I also discussed the functionality that Group Tiles could provide, especially if they contain Things of all the same type, like the current half-hearted implementation of Dashboard Shortcuts.