public static RenderElement::processGroup(&$element, FormStateInterface
public static RenderElement::processAjaxForm(&$element, FormStateInterface
Provides a base class for render element plugins. Render elements are referenced in render arrays; see the
public static RenderElement::preRenderAjaxForm($element)
public static RenderElement::setAttributes(&$element, $class
public static RenderElement::preRenderGroup($element)