public function getConfigurableOptions()
{
$resolver = new OptionsResolver();
$resolver->setDefaults(['config_file' => null, 'suite' => null, 'test' => null, 'fail_fast' => false]);
$resolver->addAllowedTypes('config_file', ['null', 'string']);
$resolver->addAllowedTypes('suite', ['null', 'string']);
$resolver->addAllowedTypes('test', ['null', 'string']);
$resolver->addAllowedTypes('fail_fast', ['bool']);
return $resolver;
}