public PlaceAutocompleteRequest components(ComponentFilter... filters) {
    return param("components", join('|', filters));
  }
A grouping of places to which you would like to restrict your results. Currently, you can use
components to filter by country.

@param filters The component filter to restrict results with.
@return Returns this {@code PlaceAutocompleteRequest} for call chaining.
src/main/java/com/google/maps/PlaceAutocompleteRequest.java