code: def test_get_architecture():
      @registry.architectures("my_test_function")
      def create_model(nr_in, nr_out):
          return Linear(nr_in, nr_out)
  
      arch = registry.architectures.get("my_test_function")
      assert arch is create_model
      with pytest.raises(RegistryError):
          registry.architectures.get("not_an_existing_key")
  
imports: import pytest
  from catalogue import RegistryError
  from thinc.api import Linear
  from spacy import registry
label_desc: Use image node_id 1 for calling a global function with example usage: test_get_architecture() and returns: Linear