code: def test_model_set_dim():
      class MyShim(Shim):
          name = "testshim"
  
      model_a = create_model("a")
      model = Model(
          "test",
          lambda X: (X, lambda dY: dY),
          dims={"nI": 5, "nO": None},
          params={"W": None, "b": None},
          refs={"a": model_a, "b": None},
          attrs={"foo": "bar"},
          shims=[MyShim(None)],
          layers=[model_a, model_a],
      )
      with pytest.raises(ValueError):
          model.set_dim("nI", 10)
      # force can be used before any parameters are set
      model.set_dim("nI", 10, force=True)
      model.set_param("W", model.ops.alloc1f(10))
      model.set_grad("W", model.ops.alloc1f(10))
      assert model.has_dim("nI")
      assert model.get_dim("nI") == 10
      with pytest.raises(KeyError):
          model.set_dim("xyz", 20)
      with pytest.raises(ValueError):
          model.set_dim("nI", 20)
      # force can't be used after any parameter is set
      with pytest.raises(ValueError):
          model.set_dim("nI", 20, force=True)
  
imports: import threading
  import time
  from collections import Counter
  import numpy
  import pytest
  from thinc.api import Adam, CupyOps, Dropout, Linear, Model, Relu, Shim, Softmax, chain, change_attr_values, concatenate, set_dropout_rate, use_ops, with_debug, wrap_model_recursive
  from thinc.compat import has_cupy_gpu
  from ..util import make_tempdir
label_desc: Use image node_id 6 for calling a global function with example usage: test_model_set_dim() without return types