class_docstr: Tests the flatten and unflatten functions
class_docstr_tok: ["Tests","the","flatten","and","unflatten","functions"]
docstr: Tests that unflatten raises an error if the given model is not supported
docstr_tok: ["Tests","that","unflatten","raises","an","error","if","the","given","model","is","not","supported"]
code: def test_unflatten_error_unsupported_model(self):
      """Tests that unflatten raises an error if the given model is not supported"""
  
      with pytest.raises(
          TypeError, match="Unsupported type in the model"
      ):
          model = lambda x: x  # not a valid model for unflatten
          pu.unflatten(flat_dummy_array, model)
  
imports: import functools
  import itertools
  import pytest
  import numpy
  import pennylane
  import pennylane.utils
label_desc: Use image node_id 3 for calling the TestFlatten obj's underlying member method code with example usage: obj.test_unflatten_error_unsupported_model() without return types