buildArk 
  通过 DSL 语法构建 Message.Ark.
val ark = buildArk("0") {
    kvs { // 增加kvs
        kv("Key1", "value") // kv
        kv("Key2", "value2") {
            obj() // empty obj -> { "objKv": [] }
            obj {
                kv("objKey1", "valueA")
                kv("objKey2", "valueB")
            }
        }
    }
 }Content copied to clipboard
根据模板ID构建一个 Message.Ark