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def open_branch(self, name=None, unsupported=False,
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"""See BzrDir.open_branch."""
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from bzrlib.branch import BzrBranchFormat4
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format = BzrBranchFormat4()
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self._check_supported(format, unsupported)
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def sprout(self, url, revision_id=None, force_new_repo=False,
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possible_transports=None, accelerator_tree=None,