offsetUnset(string $name) Removes a child (implements \ArrayAccess).

buildView(FormView $view,

interface DataTransformerInterface Transforms a value between different representations.

FormConfigBuilderInterface

buildView(FormView $view,

string getExtendedType() Returns the name of the type being extended.

FormTypeGuesserInterface|null

setTheme(FormView $view, mixed $themes)

string getBlockPrefix() Returns the prefix of the template block name for this type. The

offsetSet($key, $value) {@inheritdoc} Parameters