def METHOD_NAME(create):
    """Test transition and initial pseudostate disconnection."""
    v1 = create(PseudostateItem, UML.Pseudostate)
    create(StateItem, UML.State)
    t = create(TransitionItem)
    assert t.subject is None
    # connect head of transition to an initial pseudostate
    connect(t, t.head, v1)
    assert get_connected(t, t.head)
    # perform the test
    disconnect(t, t.head)
    assert not get_connected(t, t.head)