public static Select::processSelect(&$element, FormStateInterface $form_state

Provides a trait for radios, checkboxes, and similar composite form elements. Any form element that is comprised of several distinct parts can

Provides a form element for a table with radios or checkboxes in left column. Properties: #header:

public static VerticalTabs::preRenderVerticalTabs($element)

public static OutputStrategyInterface::renderFrom

public MetadataBubblingUrlGenerator::__

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

public Hidden::getInfo() Returns the

protected HtmlResponseAttachmentsPr

public AttachmentsInterface::getAttachments()