Issue #3017710 by ndobromirov, joseph.olstad, Wim Leers, alexpott, Berdir,...

      // The property path of this data object is the parent's path appended

      // by this object's name.

      $prefix = $this->parent->getPropertyPath();

      return (strlen($prefix) ? $prefix . '.' : '') . $this->name;

      return $prefix !== '' ? "{$prefix}.{$this->name}" : $this->name;

    }

    // If no parent is set, this is the root of the data tree. Thus the property

    // path equals the name of this data object.