message: fix: avoid breaking change in types.
diff: @@ -132,6 +132,10 @@ class Displayable<Props extends DisplayableProps = DisplayableProps> extends Ele
  protected _rect: BoundingRect
  /************* Properties will be inejected in other modules. *******************/
  +
  + // @deprecated.
  + useHoverLayer?: boolean
  +
  __hoverStyle?: CommonStyleProps
  // TODO use WeakMap?
  