code: def test_nested_params():
      data = decode_nested_parameters(
          {
              "$env.num_workers": "4",
              "$evaluation.quantiles": [0.1, 0.5, 0.9],
              "prediction_length": 14,
          }
      )
  
      hps = data.pop("")
      assert hps["prediction_length"] == 14
  
      env = data.pop("env")
      assert env["num_workers"] == "4"
  
      evaluation = data.pop("evaluation")
      assert evaluation["quantiles"] == [0.1, 0.5, 0.9]
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_nested_params() without return types