JSONObject in java can not use get method with default value

[githubbbbber]

Describe the bug
I pass a JSONObject in java to python env, but I can't use this_json_object.get("key1", [[]]).
the json object is like {"key1":[[{"innerKey":"innerValue"}]]}
I can use getattr(this_json_object, 'get')("key1", [[]]) or this_json_object.get("key1") to get the value

Environment (please complete the following information):

• OS Platform, Distribution, and Version: linux OS
• Python Distribution and Version: 3.11
• Java Distribution and Version: 11
• Jep Version: 4.20

[bsteffensmeier]

Which package is JSONObject in. Can you link the source or javadoc for JSONObject? What error do you get when you use this_json_object.get("key1", [[]])?