code: public void setViewBox(final double west, final double north, final double east, final double south) {
          this.viewBox = new BoundingBox();
          this.viewBox.setWest(west);
          this.viewBox.setNorth(north);
          this.viewBox.setEast(east);
          this.viewBox.setSouth(south);
      }
docs: Sets the preferred area to find search results;
  
  @param west
  the west bound
  @param north
  the north bound
  @param east
  the east bound
  @param south
  the south bound