public static FormElement::valueCallback(&$element, $input, FormStateInterface

Provides a form submit button. Submit buttons are processed the same as regular buttons, except they trigger the form's submit handler.

public Tel::getInfo() Returns the element

Provides a form element for a single radio button. This is an internal element that is primarily used to render the radios form element. Refer

public static Actions::preRenderActionsDropbutton(&$element, FormStateInterface

public static PasswordConfirm::processPasswordConfirm(&$element

public static Table::validateTable(&$element, FormStateInterface $form_state

public static Email::validateEmail(&$element, FormStateInterface $form_state

public static File::processFile(&$element, FormStateInterface $form_state,

public static Table::preRenderTable($element)