code: def test_list(self):
      a = [dict(x=1)]
      b = [dict(y=2)]
  
      c = utils.merge_params(a, b)
  
      assert c == [{"x": 1, "y": 2}]
  
imports: from unittest import TestCase
  import pytest
  from elegy import utils
label_desc: Use image node_id 4 for calling the TestMergeStructs obj's underlying member method code with example usage: obj.test_list() without return types