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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 full_name(self):
 """ The full name of this route's view function, including the module path and controller name, if any. """

        if not self.view_func:
            return None

        prefix = self.view_func.__module__
        if self._controller_cls:
            prefix = f'{prefix}.{self._controller_cls.__name__}'
        return f'{prefix}.{self.method_name}'