@Override
  public String toString() {
    return "RegionSubRegionsSizeResponse [from=" + getRecipient() + ' '
        + (snapshot == null ? "null" : snapshot.toString());
  }
Returns the DataSerializer fixed id for the class that implements this method.
geode-core/src/main/java/org/apache/geode/internal/admin/remote/RegionSubRegionsSizeResponse.java