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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 minor(self):
 """ Minor inbox feed, contains minor activities such as likes, shares and follows. """

        url = self._subfeed("minor")
        if "minor" in self.url or "major" in self.url:
            return self
        if self._minor is None:
            self._minor = self.__class__(url, pypump=self._pump)
        return self._minor