RequestHandlerInterface getRequestHandler()
FormErrorIterator getErrors(bool $deep = false
bool isRoot() Returns whether the field is the root of the form tree.
string getBlockPrefix() Returns the prefix of the template block name for this type. The
string renderCsrfToken(string $tokenId) Renders a CSRF token. Use this helper for CSRF
FormInterface addError(
bool getCompound() Returns whether the form is compound. This property is independent
FormInterface handleRequest(mixed $request = null)
offsetSet(mixed $offset, mixed $value) Unsupported method. This method should not be invoked
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