presto-spi/src/main/java/io/prestosql/spi/type/QuantileDigestType.java/QuantileDigestType/QuantileDigestType
class QuantileDigestType:    @JsonCreator
    public QuantileDigestType(Type type)
    {
        super(new TypeSignature(StandardTypes.QDIGEST, TypeSignatureParameter.typeParameter(type.getTypeSignature())), Slice.class);
        this.type = type;
    }