presto-main/src/main/java/io/prestosql/operator/aggregation/BooleanOrAggregation.java/BooleanOrAggregation/output
class BooleanOrAggregation:    @OutputFunction(StandardTypes.BOOLEAN)
    public static void output(@AggregationState TriStateBooleanState state, BlockBuilder out)
    {
        TriStateBooleanState.write(BooleanType.BOOLEAN, state, out);
    }