contact_post_update_add_message_redirect_field_to_contact_form

contact_post_update_add_message_redirect_field_to_contact_form()

function contact_post_update_add_message_redirect_field_to_contact_form() {
  /** @var \Drupal\contact\ContactFormInterface $contact */
  foreach (ContactForm::loadMultiple() as $contact) {
    $contact
    ->setMessage('Your message has been sent.')
      ->setRedirectPath('')
      ->save();
  }
}