presto-main/src/main/java/io/prestosql/operator/aggregation/ArbitraryAggregationFunction.java/ArbitraryAggregationFunction/ArbitraryAggregationFunction
class ArbitraryAggregationFunction:    protected ArbitraryAggregationFunction()
    {
        super(
                new FunctionMetadata(
                        new Signature(
                                NAME,
                                ImmutableList.of(typeVariable("T")),
                                ImmutableList.of(),
                                new TypeSignature("T"),
                                ImmutableList.of(new TypeSignature("T")),
                                false),
                        true,
                        ImmutableList.of(new FunctionArgumentDefinition(false)),
                        false,
                        true,
                        "return an arbitrary non-null input value",
                        AGGREGATE),
                true,
                false);
    }