public static HtmlTag::preRenderHtmlTag($element)

public static Element::isEmpty(array $elements) Indicates

public Button::getInfo() Returns the

public static Dropbutton::preRenderDropbutton($element)

Provides a link render element for a "more" link, like those used in blocks. Properties: #title:

public static Weight::processWeight(&$element, FormStateInterface $form_state

Do not convert the submitted value from the user-supplied path. File core/lib/Drupal/Core/Render/Element/PathElement

public Radio::getInfo() Returns the element

Provides a form element for selecting a language. This does not render an actual form element, but always returns the value of the default language

Provides a form element for a submit button with an image. Plugin annotation