1. protected
  2. mustCallSuper
void debugFillDescription(List<String> description)

Accumulates a list of strings describing the current node's fields, one field per string. Subclasses should override this to have their information included in toString.

Source 

@protected
@mustCallSuper
void debugFillDescription(List<String> description) {
  description.add(isScrollable ? 'scrollable' : 'not scrollable');
}