=== a.py
class Base:
    pass
=== b.py
class Base:
    pass
=== main.py
from b import Base

class Child(Base):
    pass
=== expected
symbol a.py:1 Base class
symbol b.py:1 Base class
symbol main.py:3 Child class
edge main.py:1 main.py imports Base -> b.py:1 Base EXTRACTED 1
edge main.py:3 Child extends Base -> b.py:1 Base EXTRACTED 1
