code: public static BoundingBox getProjectedBoundingBox(Long projectionEpsg,
  			int x, int y, int zoom) {
  		return getProjectedBoundingBox(ProjectionConstants.AUTHORITY_EPSG,
  				projectionEpsg, x, y, zoom);
  	}
docs: Get the Projected tile bounding box from the Google Maps API tile
  coordinates and zoom level
  
  @param projectionEpsg
  projection epsg
  @param x
  x coordinate
  @param y
  y coordinate
  @param zoom
  zoom level
  @return bounding box