export class Constants {
  static readonly EXECUTIVE = 'EX';
  static readonly ECONOMIC = 'EC';
  static readonly BAD_REQUEST = 'bad_request';
  static readonly EMPTY_SEARCH = 'empty_search';
  static readonly ERROR = 'error';
  static readonly INTERNAL_ERROR = 'internal_error';
  static readonly ROUND_TRIP = 'RT';
  static readonly ONE_WAY = 'OW';
}