如何在声明性Jenkinsfile中跨阶段保留非字符串对象？

pipeline {
    agent any
    environment {
        myObject = [key1: "value1", key2: "value2"] // 定义一个非字符串对象
    }
    stages {
        stage('Stage 1') {
            steps {
                echo "My object: ${env.myObject}" // 在阶段中使用非字符串对象
            }
        }
        stage('Stage 2') {
            steps {
                script {
                    def myObject = env.myObject // 从环境中获取非字符串对象
                    // 在阶段中使用myObject
                    echo "Key 1: ${myObject.key1}"
                    echo "Key 2: ${myObject.key2}"
                }
            }
        }
    }
}

package com.example

class MyObject {
    def key1
    def key2
}

class MyUtils {
    static MyObject createObject() {
        def obj = new MyObject()
        obj.key1 = "value1"
        obj.key2 = "value2"
        return obj
    }
}

@Library('my-library') _
import com.example.MyUtils

pipeline {
    agent any
    stages {
        stage('Stage 1') {
            steps {
                script {
                    def myObject = MyUtils.createObject() // 使用库中的方法创建非字符串对象
                    // 在阶段中使用myObject
                    echo "Key 1: ${myObject.key1}"
                    echo "Key 2: ${myObject.key2}"
                }
            }
        }
    }
}