@Nullable Long version = versionString == null ? null : Long.parseLong(versionString);
@Nullable ClientId clientId = version != null ? null
: new ClientId(random64.next(
// TODO(ohler): justify this number
8));
LoadedWave wave;
try {
if (version == null) {
wave = loader.load(convObjectId, clientId);
} else {
wave = loader.loadStaticAtVersion(convObjectId, version);