// add snapshot feature if necessary
DirectoryWithSnapshotFeature sf = getDirectoryWithSnapshotFeature();
if (sf == null) {
sf = this.addSnapshotFeature(null);
}
return sf.saveChild2Snapshot(this, child, latestSnapshotId, snapshotCopy);
}
/**
* @param name the name of the child
* @param snapshotId