public static Number::validateNumber(&$element, FormStateInterface $form_state

public static StatusMessages::generatePlaceholder(array $element)

public Search::getInfo() Returns the

Provides a one-line text field form element. Properties: #maxlength: Maximum number of

Provides a form element for numeric input, with special numeric validation. Properties: #default_value:

Provides a render element for a form. Plugin annotation @RenderElement("form")

public static VerticalTabs::processVerticalTabs(&$element, FormStateInterface

public static Element::setAttributes(array &$element, array $map)

public static Actions::processActions(&$element, FormStateInterface $form_state

Provides a display-only form element with an optional title and description. Note: since this is a read-only field, setting the #required property