code: def test_sort():
      expected = []
  
      expected.append(parse_transitions.Shift())
      expected.append(parse_transitions.CloseConstituent())
      expected.append(parse_transitions.CompoundUnary("NP"))
      expected.append(parse_transitions.CompoundUnary("NP", "VP"))
      expected.append(parse_transitions.OpenConstituent("mox"))
      expected.append(parse_transitions.OpenConstituent("opal"))
      expected.append(parse_transitions.OpenConstituent("unban"))
  
      transitions = set(expected)
      transitions = sorted(transitions)
      assert transitions == expected
  
imports: import pytest
  from stanza.models.constituency import parse_transitions
  from stanza.models.constituency.base_model import SimpleModel, UNARY_LIMIT
  from stanza.models.constituency.parse_transitions import TransitionScheme, Shift, CloseConstituent, OpenConstituent
  from stanza.tests import *
label_desc: Use image node_id 15 for calling a global function with example usage: test_sort() without return types