@Override
protected void onPostExecute(List<MosaicMessage> messages) {
callback.setMessages(messages);
}
@Override
protected void onPostExecute(MosaicMessage message) {
if (message != null) callback.updateMessage(message);
}
@Override
protected void onPostExecute(Void result) {
if (mosaicUser != null) callback.setNickname(mosaicUser.getNickname());
else callback.setNickname(null);
}