grib/src/main/java/ucar/nc2/grib/collection/GribCollectionMutable.java
public List<String> getFilenames() {
    List<String> result = new ArrayList<>();
    for (MFile file : fileMap.values())
      result.add(file.getPath());
    Collections.sort(result);
    return result;
  }
public List<String> getFilenames() {
    List<String> result = new ArrayList<>();
    for (MFile file : fileMap.values())
      result.add(file.getPath());
    Collections.sort(result);
    return result;
  }
The files that comprise the collection.
Actual paths, including the grib cache if used.

@return list of filename.