bool offsetExists(string $name) Returns whether the given child exists (implements \ArrayAccess)

string getMethod() Returns the HTTP method used by the form.

interface ButtonTypeInterface implements

ResolvedFormTypeInterface|null

mixed getOption(string $name, mixed $default = null) Returns the value of a specific option.

int|bool getResourceHierarchyLevel(FormView $view, array $blockNameHierarchy

string getMethod() Unsupported method.

FormFactoryBuilderInterface

seek(int $position) Sets the position of the iterator.

int|bool getResourceHierarchyLevel(FormView $view, array $blockNameHierarchy