decoration property Null safety

Decoration decoration

What decoration to paint.

Commonly a BoxDecoration.

Implementation

Decoration get decoration => _decoration;
void decoration=(Decoration value)

Implementation

set decoration(Decoration value) {
  assert(value != null);
  if (value == _decoration) {
    return;
  }
  _painter?.dispose();
  _painter = null;
  _decoration = value;
  markNeedsPaint();
}