InternalTells module:ui/template~Template#_renderNode to render
children into DocumentFragment first and then append the fragment
to the parent element. It is a speed optimization.
Indicates whether the #node has been provided by module:ui/template~Template#apply.
A node which is being rendered.
OptionalrevertAn object storing the data that helps module:ui/template~Template#revert bringing back an element to its initial state, i.e. before module:ui/template~Template#apply was called.
The module:ui/template~Template#_renderNode configuration.