presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/PrestoThriftNullableToken.java/PrestoThriftNullableToken/toString
class PrestoThriftNullableToken:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("token", token)
                .toString();
    }