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return klass.open(base, _unsupported=True)
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def open(klass, base, _unsupported=False, possible_transports=None):
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def open(klass, base, possible_transports=None, probers=None,
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"""Open an existing controldir, rooted at 'base' (url).
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:param _unsupported: a private parameter to the ControlDir class.
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t = _mod_transport.get_transport(base, possible_transports)
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def open_from_transport(klass, transport, _unsupported=False,
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"""Open a controldir within a particular directory.
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:param transport: Transport containing the controldir.