返回类型为空的JDBI Transactional .inTransaction()？

import org.jdbi.v3.core.Handle;
import org.jdbi.v3.core.Jdbi;

public class Example {
    public void performDatabaseOperations() {
        Jdbi jdbi = Jdbi.create("jdbc:mysql://localhost/mydb", "username", "password");
        
        jdbi.useHandle(handle -> {
            handle.inTransaction(h -> {
                // 在事务中执行数据库操作
                h.execute("INSERT INTO table_name (column1, column2) VALUES (?, ?)", value1, value2);
                h.execute("UPDATE table_name SET column1 = ? WHERE column2 = ?", value1, value2);
                // 其他数据库操作...
            });
        });
    }
}