easing property
      
      String?
      get
      easing
      
    
    
    
Implementation
String? get easing {
  return _easing;
}
      
      set
      easing
      (String? value) 
      
    
    
    
Implementation
set easing(String? value) {
  _easingCurve = _parseEasing(value);
  _easing = value;
}