convert facet pid to object label

gistfile1.php

public function renderText($results) {
    module_load_include('inc', 'islandora', 'includes/utilities');
    $facet_field = $this->facet_field;
    $islandora_solr_query = self::$islandoraSolrQuery;
    $soft_limit = self::$soft_limit;
    $buckets = array();
    foreach ($results as $key => $values) {
      $bucket = $values['bucket'];
      if (variable_get('islandora_solr_facet_replace_pid', FALSE) && islandora_is_valid_pid($bucket)) {
        if ($object = islandora_object_load($bucket)) {
          if (islandora_object_access(ISLANDORA_VIEW_OBJECTS, $object)) {
            $bucket = $object->label;
          }
        }
      }

      $filter = $values['filter'];
      $count = $values['count'];