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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def endpoint(self, endpoint: str) -> Callable: """Register a function as an endpoint. This is designed to be used as a decorator. An example usage, .. code-block:: python @app.endpoint('name') def endpoint():
 Arguments: endpoint: The endpoint name to use. """

        def decorator(func: Callable) -> Callable:
            handler = ensure_coroutine(func)
            self.view_functions[endpoint] = handler
            return func
        return decorator