/**
  * Get metadata about fields in the Solr/Lucene index.
  *
  * @param int $num_terms
  *   Number of 'top terms' to return.
  *
  * @return array
  *   An array of SearchApiSolrField objects.
  *
  * @see SearchApiSolrConnectionInterface::getFields()
  */
 public function getFields($num_terms = 0)
 {
     $this->connect();
     return $this->solr->getFields($num_terms);
 }