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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_child_edges(self):
 """Return tuples for all child GO IDs, containing current GO ID and child GO ID."""

        all_child_edges = set()
        for parent in self.children:
            all_child_edges.add((parent.item_id, self.item_id))
            all_child_edges |= parent.get_all_child_edges()
        return all_child_edges