function setupValidity(instance) {
  instance.$$classCache = {};
  instance.$$classCache[INVALID_CLASS] = !(instance.$$classCache[VALID_CLASS] = instance.$$element.hasClass(VALID_CLASS));
}
function setupValidity(instance) {
  instance.$$classCache = {};
  instance.$$classCache[INVALID_CLASS] = !(instance.$$classCache[VALID_CLASS] = instance.$$element.hasClass(VALID_CLASS));
}
function setupValidity ( instance ) { instance . $$classCache = { } ; instance . $$classCache [ INVALID_CLASS ] = ! ( instance . $$classCache [ VALID_CLASS ] = instance . $$element . hasClass ( VALID_CLASS ) ) ; }
helper methods
helper methods