Change record status: 
Project: 
Introduced in branch: 
8.0.x
Description: 

Element::isEmpty() added. Indicates whether the given element is empty.

(An element that only has #cache set is considered empty, because it will render to the empty string.)

Impacts: 
Module developers
Themers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done