如何在内部调用显式接口实现方法而不进行显式转换？

from abc import ABC, abstractmethod

class Target:
    @abstractmethod
    def request(self) -> str:
        pass

class Adaptee:
    def specific_request(self) -> str:
        return "这是一个特定的请求。"

class Adapter(Target):
    def __init__(self, adaptee: Adaptee):
        self._adaptee = adaptee

    def request(self) -> str:
        return self._adaptee.specific_request()

def client_code(target: Target) -> None:
    print(target.request())

adaptee = Adaptee()
adapter = Adapter(adaptee)
client_code(adapter)