docs: public static Envelope getTileBounds(TileCode code, Envelope maxExtent, double scale) {
  		double[] layerSize = getTileLayerSize(code, maxExtent, scale);
  		if (layerSize[0] == 0) {
  			return null;
  		}
  		double cX = maxExtent.getMinX() + code.getX() * layerSize[0];
  		double cY = maxExtent.getMinY() + code.getY() * layerSize[1];
  		return new Envelope(cX, cX + layerSize[0], cY, cY + layerSize[1]);
  	}