__toString.
Return value
string The parameter key
File
 
   - drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Parameter.php, line 40
 
  
  Class
  
  - Parameter 
 
  - Parameter represents a parameter reference.
 
  Namespace
  Symfony\Component\DependencyInjection
Code
public function __toString() {
  return (string) $this->id;
}