BetterReflection\Reflection\ReflectionClass::getNamespaceName PHP Method

    public function getNamespaceName()
    {
        if (!$this->inNamespace()) {
            return '';
        }
        return implode('\\', $this->declaringNamespace->name->parts);
    }

 /**
  * {@inheritDoc}
  */
 public function getNamespaceName()
 {
     return $this->betterReflectionClass->getNamespaceName();
 }