presto-main/src/main/java/io/prestosql/operator/aggregation/ChecksumAggregationFunction.java/ChecksumAggregationFunction/ChecksumAggregationFunction
class ChecksumAggregationFunction:    public ChecksumAggregationFunction()
    {
        super(
                new FunctionMetadata(
                        new Signature(
                                NAME,
                                ImmutableList.of(comparableTypeParameter("T")),
                                ImmutableList.of(),
                                VARBINARY.getTypeSignature(),
                                ImmutableList.of(new TypeSignature("T")),
                                false),
                        true,
                        ImmutableList.of(new FunctionArgumentDefinition(true)),
                        false,
                        true,
                        "Checksum of the given values",
                        AGGREGATE),
                true,
                false);
    }