eZ\Publish\Core\MVC\ConfigResolverInterface::hasParameter PHP Метод

    public function hasParameter($paramName, $namespace = null, $scope = null);

 /**
  * Returns the parameter value from config resolver.
  *
  * @param string $parameterName
  * @param string $namespace
  * @param mixed $defaultValue
  *
  * @return mixed
  */
 protected function getParameter($parameterName, $namespace, $defaultValue = null)
 {
     if ($this->configResolver->hasParameter($parameterName, $namespace)) {
         return $this->configResolver->getParameter($parameterName, $namespace);
     }
     return $defaultValue;
 }