code: @Override
  	public void setZ(double min, double max) {
  		if (min <= max) {
  			this.minz = min;
  			this.maxz = max;
  		} else {
  			this.minz = max;
  			this.maxz = min;
  		}
  	}
docs: Set the z bounds of the box.
  
  @param min the min value for the z axis.
  @param max the max value for the z axis.