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# yet, and are unlikely to in non-rich-root environments anyway.
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root_id_order.sort(key=operator.itemgetter(0))
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# Create a record stream containing the roots to create.
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new_roots_stream = _new_root_data_stream(
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root_id_order, rev_id_to_root_id, parent_map, self.source, graph)
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return [('texts', new_roots_stream)]
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def _new_root_data_stream(
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root_keys_to_create, rev_id_to_root_id_map, parent_map, repo, graph=None):
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"""Generate a texts substream of synthesised root entries.