Language manager service. Type:

public MessageInterface::copySender()

public static ContactController::create(ContainerInterface

public MessageInterface::getPersonalRecipient()

public ContactForm::getRedirectPath()

public MessageInterface::setMessage($message)

public Message::getMessage() Returns

public MessageInterface::getContactForm()

public MessageForm::preview(array $form, FormStateInterface $form_state)

public MessageInterface::setSubject($subject)