List<Path> findStatFiles(Path workingDir) throws IOException {
    Predicate<Path> statFileSelector =
        (Path file) -> file.toString().toLowerCase().endsWith(".gfs");
    return findFiles(workingDir, statFileSelector);
  }
@return size of file in bytes
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/util/LogExporter.java