Provider/ListProviderRegistry.php
public function getFieldDescriptors($template, $webspace, $locale, $uuid)
    {
        $provider = $this->getProvider($template);

        return $provider->getFieldDescriptors($webspace, $locale, $uuid);
    }
public function getFieldDescriptors($template, $webspace, $locale, $uuid)
    {
        $provider = $this->getProvider($template);

        return $provider->getFieldDescriptors($webspace, $locale, $uuid);
    }
@param string $template
@param string $webspace
@param string $locale
@param string $uuid

@return FieldDescriptor[]