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@@ -37,7 +37,7 @@ class VolumeFile(metaclass=abc.ABCMeta):
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@classmethod
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def find(cls, root_dir_path: str,
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filename_regex: typing.Optional[typing.Pattern] = None,
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- ) -> typing.Iterator[VolumeFile]:
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+ ) -> typing.Iterator['VolumeFile']:
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if not filename_regex:
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filename_regex = cls.FILENAME_REGEX
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for dirpath, _, filenames in os.walk(root_dir_path):
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