If an Advice implements this, it may be used as an introduction without an IntroductionAdvisor.
In this case, the advice is self-describing, providing not only the necessary behavior,
but describing the interfaces it introduces.
/**
* Return string representation of object
*
* @return string
*/
public function __toString()
{
$adviceClass = get_class($this->advice);
$interfaceClasses = join(',', $this->advice->getInterfaces());
return get_called_class() . ": advice [{$adviceClass}]; interfaces [{$interfaceClasses}] ";
}
