presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/ExtraColumnMetadata.java/ExtraColumnMetadata/ExtraColumnMetadata
class ExtraColumnMetadata:    @JsonCreator
    public ExtraColumnMetadata(
            @JsonProperty("name") String name,
            @JsonProperty("hidden") boolean hidden)
    {
        this.name = name;
        this.hidden = hidden;
    }