grib/src/main/java/ucar/nc2/grib/collection/Grib.java
public static void setDebugFlags(ucar.nc2.util.DebugFlags debugFlag) {
    debugRead = debugFlag.isSet("Grib/showRead");
    debugIndexOnly = debugFlag.isSet("Grib/indexOnly");
    debugIndexOnlyShow = debugFlag.isSet("Grib/indexOnlyShow");
    debugGbxIndexOnly = debugFlag.isSet("Grib/debugGbxIndexOnly");
  }
public static void setDebugFlags(ucar.nc2.util.DebugFlags debugFlag) {
    debugRead = debugFlag.isSet("Grib/showRead");
    debugIndexOnly = debugFlag.isSet("Grib/indexOnly");
    debugIndexOnlyShow = debugFlag.isSet("Grib/indexOnlyShow");
    debugGbxIndexOnly = debugFlag.isSet("Grib/debugGbxIndexOnly");
  }
we are running with only ncx index files, no data