Traceback (most recent call last):
  File "/Users/magicliang/Desktop/Programming/git/hexo-blog/examples/software-modeling/labs/E11/check.py", line 15, in <module>
    assert (nodes[edge["from"]]["type"], edge["type"], nodes[edge["to"]]["type"]) in allowed, "invalid typed relationship"
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: invalid typed relationship
