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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 get_paths(self):
 """Get all paths from the root to the leaves. For example, given a chain like `{'a':{'b':{'c':None}}}`, this method would return `[['a', 'b', 'c']]`. Returns: A list of lists of paths. """

        paths = []
        for key, child in six.iteritems(self):
            if isinstance(child, TreeMap) and child:
                # current child is an intermediate node
                for path in child.get_paths():
                    path.insert(0, key)
                    paths.append(path)
            else:
                # current child is an endpoint
                paths.append([key])
        return paths