The render cache service. Type:

Provides a form element for input of a weight. Weights are integers used to indicate ordering, with larger numbers later in the order.

The element info. Type:

public RendererInterface::renderPlain(&$elements)

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

public MainContentRendererInter

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