<T, R extends ApiResponse<T>> PendingResult<T> get(
      ApiConfig config, Class<? extends R> clazz, String... params) {
    return get(config, clazz, Collections.emptyMap(), params);
  }
Shut down this GeoApiContext instance, reclaiming resources. After shutdown() has been called,
no further queries may be done against this instance.
src/main/java/com/google/maps/GeoApiContext.java