code: public GriddedCoverage queryGriddedCoverage() {
  		try {
  			if (griddedCoverageDao.isTableExists()) {
  				griddedCoverage = griddedCoverageDao.query(tileMatrixSet);
  			}
  		} catch (SQLException e) {
  			throw new GeoPackageException(
  					"Failed to get Gridded Coverage for table name: "
  							+ tileMatrixSet.getTableName(), e);
  		}
  		return griddedCoverage;
  	}
docs: Query and update the gridded coverage
  
  @return gridded coverage