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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 mount(self, mount_point=None):
 """ mount container filesystem :return: str, the location of the mounted file system """

        cmd = ["podman", "mount", self._id or self.get_id()]
        output = run_cmd(cmd, return_output=True).rstrip("\n\r")
        return output