/**
  * {@inheritdoc}
  */
 public function getPossibleSuggestions(string $name) : array
 {
     $suggestions = array_merge([], [], ...array_map(function (SuggestorInterface $suggestor) use($name) {
         return $suggestor->getPossibleSuggestions($name);
     }, $this->suggestors));
     if (count($suggestions) === 0) {
         return [];
     }
     return $this->userRepository->filterUniqueUsernames($suggestions);
 }