Custom options in a FormTypeExtension not parsed when getExtendedClass is class ref

[cedricziel]

class ApplicationFlowFormTypeExtension extends AbstractTypeExtension
{
    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefined(['page', '..']);
    }

    /**
     * Returns the name of the type being extended.
     *
     * @return string The name of the type being extended
     */
    public function getExtendedType()
    {
        return FormType::class;
    }
}

I can only guess, that the string value of the return type has a leading slash or so.

[Haehnchen]

done