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def _add_lines(self, version_id, parents, lines, parent_texts,
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left_matching_blocks, nostore_sha, random_id, check_content):
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"""See VersionedFile.add_lines."""
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idx = self._add(version_id, lines, map(self._lookup, parents),
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idx = self._add(version_id, lines, list(map(self._lookup, parents)),
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return sha_strings(lines), sum(map(len, lines)), idx