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