def __call__(self, oself, *args, **kw):
        """
        Invoke the specified L{methodName} method of the C{original} attribute
        for proxyForInterface.

        @param oself: an instance of a L{proxyForInterface} object.

        @return: the result of the underlying method.
        """
        original = getattr(oself, self.originalAttribute)
        actualMethod = getattr(original, self.methodName)
        return actualMethod(*args, **kw)

        Invoke the specified L{methodName} method of the C{original} attribute
        for proxyForInterface.

        @param oself: an instance of a L{proxyForInterface} object.

        @return: the result of the underlying method.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/components.py