Checks whether the element does not expect any input.
Checks whether the element is evaluable.
Checks whether the element contains multiple fields.
Action Hook: Allows to print additional content before an element in the frontend.
Action Hook: Allows to print additional content after an element in the frontend.
Filter Hook: Filters the main element value.
Duplicates the element including all of its contents.
Validates submission fields for this element.
Returns the parent container for the element.
Returns all element choices that belong to the element.