presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/PrestoThriftBlock.java/PrestoThriftBlock/getVarcharData
class PrestoThriftBlock:    @Nullable
    @ThriftField(value = 4, requiredness = OPTIONAL)
    public PrestoThriftVarchar getVarcharData()
    {
        return varcharData;
    }