code: function(type, args, el) {
              var height = this.cfg.getProperty("height");
              if ((height && height !== "auto") || (height === 0)) {
                  this.fillHeight(el);
              }
          }
docs: The default custom event handler executed when the overlay's height is changed,
  if the autofillheight property has been set.
  
  @method _autoFillOnHeightChange
  @protected
  @param {String} type The event type
  @param {Array} args The array of arguments passed to event subscribers
  @param {HTMLElement} el The header, body or footer element which is to be resized to fill
  out the containers height