Method parseOptionalTags

/**
 * Method to parse optional tags in the manifest
 *
 * @return  void
 *
 * @since   3.4
 */
protected function parseOptionalTags()
{
    // Parse optional tags
    $this->parent->parseMedia($this->getManifest()->media);
    $this->parent->parseLanguages($this->getManifest()->languages);
    $this->parent->parseLanguages($this->getManifest()->administration->languages, 1);
}