interface FormInterface implements ArrayAccess, Traversable, Countable
A form group bundling multiple forms in a hierarchical structure.
Methods
FormInterface setParent(FormInterface $parent = null) Sets the parent form.
FormInterface|null getParent() Returns the parent form.
FormInterface add(FormInterface|string|int $child, string|null $type = null, array $options = array()) Adds or replaces a child to the form.
FormInterface get(string $name) Returns the child with the