code: function getValidEnlargeable( enlargeable ) {
  				return enlargeable && enlargeable.type == CKEDITOR.NODE_ELEMENT && enlargeable.hasAttribute( 'contenteditable' ) ?
  					null : enlargeable;
  			}
docs: Ensures that returned element can be enlarged by selection, null otherwise. @param {CKEDITOR.dom.element} enlargeable @returns {CKEDITOR.dom.element/null}