innerAND method

Implementation

NUIDBQueryCombination innerAND(InnerLevelQuery query){
  NUIDBQueryCombination queryComb = NUIDBQueryCombination(queries: List(), operator: NUIDBQueryOperator.AND);
  query(queryComb);
  if(queryComb.queries.isNotEmpty) {
    queries.add(queryComb);
  }
  return this;
}