int count() Unsupported method. Return

class OrderedHashMap implements ArrayAccess,

offsetSet(string $name, FormInterface $child)

class ViolationPathIterator extends

Classes

EventDispatcherInterface

array getChoicesForValues(array $values) Returns the choices corresponding to the given values

bool hasTypeExtensions(string $name) Returns whether this extension provides type extensions

bool isSynchronized() Unsupported method.

FormFactoryBuilderInterface