code: function $isInInvisibleState(c) {
                  if (c.isVisible === false            ||
                      c.$container.parentNode === null ||
                      c.width       <= 0               ||
                      c.height      <= 0               ||
                      c.parent      === null           ||
                      zebkit.web.$contains(c.$container) === false)
                  {
                      return true;
                  }
  
                  var p = c.parent;
                  while (p !== null && p.isVisible === true && p.width > 0 && p.height > 0) {
                      p = p.parent;
                  }
  
                  return p !== null || ui.$cvp(c) === null;
              }
docs: Evaluates if the given zebkit HTML UI component is in invisible state.
  @param  {zebkit.ui.HtmlElement}  c an UI HTML element wrapper
  @private
  @method $isInInvisibleState
  @return {Boolean} true if the HTML element wrapped with zebkit UI is in invisible state