code: def test_ensembler():
      a = np.asarray([[1, 2, 3], [1, 2, 3], [1, 2, 3]])
      b = np.asarray([[0, 0, 0], [1, 1, 1], [2, 2, 2]])
      w = [0.25, 0.75]
      correct_answer = np.asarray(
          [[0.25, 0.5, 0.75], [1.0, 1.25, 1.5], [1.75, 2.0, 2.25]]
      )
  
      assert simple_ensembler([a, b], w).all() == correct_answer.all()
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_ensembler() without return types