Implemented by objects that have the visibility trait.

abstract class HasVisibility {

 /**
  * Determines whether or not this object is visible. Note that this does not
  * necessarily take into account whether or not the receiver's parent is
  * visible, or even if it is attached to the
  * Document. The default implementation of this trait in UIObject is
  * based on the value of a dom element's style object's display attribute.
  *
  * @return <code>true</code> if the object is visible
  */
 bool get visible;

 /**
  * Sets whether this object is visible.
  *
  * @param visible <code>true</code> to show the object, <code>false</code> to
  *          hide it
  */
 void set visible(bool visible);
}