cdm/src/main/java/ucar/unidata/io/RandomAccessFile.java
static public List<String> getAllFiles() {
    if (null == allFiles) return null;
    List<String> result = new ArrayList<>();
    result.addAll(allFiles);
    Collections.sort(result);
    return result;
  }
static public List<String> getAllFiles() {
    if (null == allFiles) return null;
    List<String> result = new ArrayList<>();
    result.addAll(allFiles);
    Collections.sort(result);
    return result;
  }
Debugging, do not use.

@return list of all files used.