presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/PrestoThriftBlock.java/PrestoThriftBlock/getJsonData
class PrestoThriftBlock:    @Nullable
    @ThriftField(value = 8, requiredness = OPTIONAL)
    public PrestoThriftJson getJsonData()
    {
        return jsonData;
    }