public function setParent($parent)
    {
        if (!$parent instanceof ClassDescriptor && !$parent instanceof InterfaceDescriptor && $parent !== null) {
            throw new \InvalidArgumentException('Constants can only have an interface or class as parent');
        }

        $fqsen = $parent !== null
            ? $parent->getFullyQualifiedStructuralElementName() . '::' . $this->getName()
            : $this->getName();

        $this->setFullyQualifiedStructuralElementName($fqsen);

        $this->parent = $parent;
    }