onDrawFrame property Null safety
A callback that is invoked for each frame after onBeginFrame has completed and after the microtask queue has been drained.
This can be used to implement a second phase of frame rendering that happens after any deferred work queued by the onBeginFrame phase.
Implementation
VoidCallback? get onDrawFrame => _onDrawFrame;
Implementation
set onDrawFrame(VoidCallback? callback) {
_onDrawFrame = callback;
_onDrawFrameZone = Zone.current;
}