if (!preserveHistory) {
List<WaveletOperation> history = Lists.newArrayList();
WaveletHistoryConverter converter = new WaveletHistoryConverter(
getConvNindoConverter(attachmentMapping));
for (WaveletOperation op :
new HistorySynthesizer().synthesizeHistory(wavelet, snapshot.getSecond())) {
history.add(converter.convertAndApply(convertGooglewaveToGmail(op)));
}
history.addAll(participantFixup);
newId = waveletCreator.newConvWithGeneratedId(
ImmutableList.<WaveletOperation>of(), convMetadata, true);