public function getConfigurableOptions()
{
$resolver = new OptionsResolver();
$resolver->setDefaults(['grunt_file' => null, 'task' => null, 'triggered_by' => ['js', 'jsx', 'coffee', 'ts', 'less', 'sass', 'scss']]);
$resolver->addAllowedTypes('grunt_file', ['null', 'string']);
$resolver->addAllowedTypes('task', ['null', 'string']);
$resolver->addAllowedTypes('triggered_by', ['array']);
return $resolver;
}