@Override
    public String toUrlValue() {
      return "circle:" + radius + "@" + center.toUrlValue();
    }
Prefer results in a specified area, by specifying either a radius plus lat/lng, or two lat/lng
pairs representing the points of a rectangle.

@param locationBias The location bias for this request.
@return Returns {@code FindPlaceFromTextRequest} for call chaining.
src/main/java/com/google/maps/FindPlaceFromTextRequest.java