presto-main/src/main/java/io/prestosql/operator/aggregation/DecimalAverageAggregation.java/DecimalAverageAggregation/DecimalAverageAggregation
class DecimalAverageAggregation:    public DecimalAverageAggregation()
    {
        super(
                new FunctionMetadata(
                        new Signature(
                                NAME,
                                new TypeSignature("decimal", typeVariable("p"), typeVariable("s")),
                                ImmutableList.of(new TypeSignature("decimal", typeVariable("p"), typeVariable("s")))),
                        true,
                        ImmutableList.of(new FunctionArgumentDefinition(false)),
                        false,
                        true,
                        "Calculates the average value",
                        AGGREGATE),
                true,
                false);
    }