// Taking the max of all the SSes would be possible, but would
// require (part) of all the other trees to be loaded as well.
// We assume that this is a rare case and the worst that can
// happen is that the DF only times out long after all the SSes
// have timed out, which is no big deal.
HADialogFragment df = (HADialogFragment) getDF();
if (df != null) {
df.setExpirationTime(this);
}
addToUnitOfWork();
}
}