Method foreach

src/examples/test_csi_plugin.cpp:231–235

    // TODO(jieyu): Consider not using CHECKs here.
    Try<list<string>> paths = fs::list(path::join(workDir, "*-*"));
    foreach (const string& path, CHECK_NOTERROR(paths)) {
      Try<VolumeInfo> createdVolume = CHECK_NOTERROR(parseVolumePath(path));
      volumes.put(createdVolume->id, createdVolume.get());
      usedCapacity += createdVolume->capacity;
    }

    // Create preprovisioned volumes if they have not existed yet.
    foreachpair (const string& name, const Bytes& capacity, _volumes) {