removeListener method Null safety

  1. @override
void removeListener(
  1. VoidCallback listener
)
override

Remove a previously registered closure from the list of closures that the object notifies when it is time to repaint.

The CustomPainter implementation merely forwards to the same method on the Listenable provided to the constructor in the repaint argument, if it was not null.

Implementation

@override
void removeListener(VoidCallback listener) => _repaint?.removeListener(listener);