AlivcPusherPreview constructor
      
      AlivcPusherPreview({ 
    
    
- Key? key,
 - @required required AlivcPusherPreviewType viewType,
 - @required required AlivcPusherPreviewCreatedCallback? onCreated,
 - @required dynamic x,
 - @required dynamic y,
 - @required dynamic width,
 - @required dynamic height,
 
Implementation
AlivcPusherPreview({
  Key? key,
  @required required this.viewType,
  @required required this.onCreated,
  @required this.x,
  @required this.y,
  @required this.width,
  @required this.height,
});