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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 add_exit(self):
 """ adds the exits from the application """

        self.completable.append("quit")
        self.completable.append("exit")

        self.descrip["quit"] = "Exits the program"
        self.descrip["exit"] = "Exits the program"

        self.command_tree.add_child(CommandBranch("quit"))
        self.command_tree.add_child(CommandBranch("exit"))

        self.command_param["quit"] = ""
        self.command_param["exit"] = ""