code: def test_for_json_encodes_list_subclass(self):
      self.assertRoundTrip(
          ListForJson(["l"]), ListForJson(["l"]).for_json()
      )
  
imports: import unittest
  import simplejson
label_desc: Use image node_id 9 for calling the TestForJson obj's underlying member method code with example usage: obj.test_for_json_encodes_list_subclass() without return types