hint property

String hint

A brief description of the result of performing an action on this node.

On iOS this is used for the accessibilityHint property defined in the UIAccessibility Protocol. On Android it is concatenated together with label and value in the following order: value, label, hint. The concatenated value is then used as the Text description.

The reading direction is given by textDirection.

Implementation 

String get hint => _hint;
void hint= (String hint)

Implementation 

set hint(String hint) {
  assert(hint != null);
  _hint = hint;
  _hasBeenAnnotated = true;
}