Type Mismatch Error: Expected type Cache, got StaticCache instead

[luoshuijs]

Description

I encountered a type error.

Upon reviewing the code, I found that StaticCache doesn't inherit from Cache. This seems to be the root cause of the type mismatch.

Fix

class Cache:
    # ... Cache methods and properties ...

class StaticCache(Cache):
    # ... StaticCache methods and properties ...

This will make StaticCache a subclass of Cache and should resolve the type mismatch.