How to use the @feathersjs/errors.NotImplemented function in @feathersjs/errors

get (id, params) {
    throw new errors.NotImplemented();
  }

async patch (id, data, params) {
    throw new errors.NotImplemented();
  }

patch (id, data, params) {
    throw new errors.NotImplemented();
  }

async update (id, data, params) {
    throw new errors.NotImplemented();
  }

async update (id, data, params) {
    throw errors.NotImplemented();
  }

remove (id, params) {
    throw new errors.NotImplemented();
  }
}

const callMethod = (self: any, name: any, ...args: any[]) => {
  if (typeof self[name] !== 'function') {
    return Promise.reject(new NotImplemented(`Method ${name} not available`));
  }

  return self[name](...args);
};

async create (data, params) {
    throw errors.NotImplemented();
  }

async remove (id, params) {
    throw new errors.NotImplemented();
  }
}

break;

      case 408:
        feathersError = new errors.Timeout(error);
        break;

      case 409:
        feathersError = new errors.Conflict(error);
        break;

      case 422:
        feathersError = new errors.Unprocessable(error);
        break;

      case 501:
        feathersError = new errors.NotImplemented(error);
        break;

      case 503:
        feathersError = new errors.Unavailable(error);
        break;

      case 500:
      default:
        feathersError = new errors.GeneralError(error);
    }

    if (error.data) {
      feathersError.data = error.data;
    }

    throw feathersError;