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"""Return true if this bzrdir is one whose format we can convert from."""
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"""Check whether format is a supported format.
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If allow_unsupported is True, this is a no-op.
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if not allow_unsupported and not format.is_supported():
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def clone(self, url, revision_id=None, basis=None, force_new_repo=False):
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"""Clone this bzrdir and its contents to url verbatim.