TomTomGeocoder = function TomTomGeocoder(httpAdapter, options) {
  TomTomGeocoder.super_.call(this, httpAdapter, options);

  if (!this.options.apiKey || this.options.apiKey == 'undefined') {
    throw new Error('You must specify an apiKey');
  }
}
Constructor
@param <object> httpAdapter Http Adapter
@param <object> options     Options (language, clientId, apiKey)