presto-main/src/main/java/io/prestosql/operator/aggregation/BitwiseAndAggregation.java/BitwiseAndAggregation/combine
class BitwiseAndAggregation:    @CombineFunction
    public static void combine(@AggregationState NullableLongState state, @AggregationState NullableLongState otherState)
    {
        if (state.isNull()) {
            state.setNull(otherState.isNull());
            state.setLong(otherState.getLong());
        }
        else if (!otherState.isNull()) {
            state.setLong(state.getLong() & otherState.getLong());
        }
    }