如何在Kotlin中替换可变映射中特定密钥的值

我有一个来自api的响应,我想在其中替换特定KEY的VALUE。如何做到

MutableMap<String!, String!> 

{sendbird_call={“user_id”:“91990000000”,“push_sound”:”default“,”is_voip“:true,”push_alert“:”“,”client_id“:”xxxxx-xxx-xxxx-xxxx-xxxxxxx“,”command“:{”sequence_number“:2,”payload“:”, “peer_connection_id”:null },“delivery_info”:{“type”:“push”},“message_id”:“xxxx-xxxx-xxx-xx-xxxx”,“cmd”:, 消息

根据以上响应,我需要更改的值 对等连接id 从…起 无效的 到 ""

var msgData = JSONObject(receivedMap["sendbird_call"])
  if (msgData.has("command")) {
     val dataCommand: JSONObject = msgData.getJSONObject("command")
        if (dataCommand.has("payload")) {
           val dataPay: JSONObject = dataCommand.getJSONObject("payload")
              if (dataPay.has("peer_connection_id")) {
                 if(dataPay.getString("peer_connection_id").equals(null)){
                    dataPay.put("peer_connection_id","")
                 }
              }
        }
  }

任何建议或帮助

IR42的回答

 private fun replacePeerID(receivedMap: Map<String, String>): Map<String, String> {

    var msgData = JSONObject(receivedMap["sendbird_call"])

    msgData.optJSONObject("command")
        ?.optJSONObject("payload")
        ?.let {
            if (it.has("peer_connection_id") && it.opt("peer_connection_id") == null) {
                it.put("peer_connection_id", "")
            }
        }

    return receivedMap
}