private TimeCoord readTimeCoord(GribCollectionProto.Coord pc) throws IOException {
   if (pc.getBoundCount() > 0) { // its an interval
     List<TimeCoord.Tinv> coords = new ArrayList<TimeCoord.Tinv>(pc.getValuesCount());
     for (int i = 0; i < pc.getValuesCount(); i++)
       coords.add(new TimeCoord.Tinv((int) pc.getValues(i), (int) pc.getBound(i)));
     TimeCoord tc = new TimeCoord(pc.getCode(), pc.getUnit(), coords);
     return tc.setIndex(pc.getIndex());
   } else {
     List<Integer> coords = new ArrayList<Integer>(pc.getValuesCount());
     for (float value : pc.getValuesList()) coords.add((int) value);
     TimeCoord tc = new TimeCoord(pc.getCode(), pc.getUnit(), coords);
     return tc.setIndex(pc.getIndex());
   }
 }