alwaysIncludeSemantics property
Whether child semantics are included regardless of the opacity.
If false, semantics are excluded when opacity is 0.0.
Defaults to false.
Implementation
bool get alwaysIncludeSemantics => _alwaysIncludeSemantics;Implementation
set alwaysIncludeSemantics(bool value) {
  if (value == _alwaysIncludeSemantics) {
    return;
  }
  _alwaysIncludeSemantics = value;
  markNeedsSemanticsUpdate();
}