code: public boolean contains(Envelope2D other) {// Note: Will return False, if
  												// either envelope is empty.
  		return other.xmin >= xmin && other.xmax <= xmax && other.ymin >= ymin
  				&& other.ymax <= ymax;
  	}
docs: Returns True if the envelope contains the other envelope (boundary
  inclusive).
  @param other The other envelope.
  @return True if this contains the other.