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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_all_handleable_leaves(self):
 """ Get list of all handleable devices, return only those that represent leaf nodes within the filtered device tree. """

        nodes = self.get_device_tree()
        return [node.device
                for node in sorted(nodes.values(), key=DevNode._sort_key)
                if not node.ignored and node.device
                and all(child.ignored for child in node.children)]