/**
 * Returns the errors of this form.
 *
 * @param bool $deep Whether to include errors of child forms as well
 * @param bool $flatten Whether to flatten the list of errors in case
 * $deep is set to true
 *
 * @return FormErrorIterator An iterator over the {@link FormError}
 * instances that where added to this form
 */
 public function getErrors(bool $deep = false, bool $flatten = true);