rpushx method
Inserts value at the tail of the list stored at key, only if key already exists and holds a list. In contrary to RPUSH, no operation will be performed when key does not yet exist.
Returns the length of the list after the push operation.
Implementation
Future<int> rpushx(String key, List<Object> values) async {
return _getInteger(await _execCmd(['RPUSHX', key, ...values]));
}