code: private function nameFromAcademicDomain($domain)
      {
          $path = $this->getPath($domain);
  
          if ( ! file_exists($path)) {
              return null;
          }
  
          return trim(file_get_contents($path));
      }
docs: Retrieves the institution name matching a domain.
  
  @param  array       $domain
  @return string|null Name of institution if found, null if file doesn't exist.