docs: @Pure
  	public boolean contains(Point2D<?, ?> point, double delta) {
  		final Rectangle2d bounds = getBoundingBox();
  		if (bounds == null) {
  			return false;
  		}
  		double dlt = delta;
  		if (dlt < 0) {
  			dlt = -dlt;
  		}
  		if (dlt == 0) {
  			return bounds.contains(point);
  		}
  		return Circle2afp.intersectsCircleRectangle(
  				point.getX(), point.getY(), dlt,
  				bounds.getMinX(), bounds.getMinY(), bounds.getMaxX(), bounds.getMaxY());
  	}