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