element property
Implementation
@override
PCanvasElement? get element => _element;Implementation
@override
set element(PCanvasElement? element) {
  if (!identical(element, _element)) {
    _element = element;
    _buildComputer();
  }
}@override
PCanvasElement? get element => _element;@override
set element(PCanvasElement? element) {
  if (!identical(element, _element)) {
    _element = element;
    _buildComputer();
  }
}