code: public function getLocationString()
      {
          $normalized = '';
          if ($this->city !== null) {
              $normalized .= $this->city->name;
          }
          if ($this->region !== null) {
              $normalized .= ' ' . $this->region->name;
          }
          if ($this->postal_code !== null) {
              $normalized .= ' ' . $this->postal_code;
          }
          return $normalized;
      }
docs: Gets the string identifying the fixed part of the location.
  
  @return string