onKeyData property Null safety

KeyDataCallback? onKeyData

A callback that is invoked when key data is available.

The framework invokes this callback in the same zone in which the callback was set.

Implementation

KeyDataCallback? get onKeyData => _onKeyData;
void onKeyData=(KeyDataCallback? callback)

Implementation

set onKeyData(KeyDataCallback? callback) {
  _onKeyData = callback;
  _onKeyDataZone = Zone.current;
}