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This is a fork of the pymox library intended to work with Python 3.
The file was modified by quermit@gmail.com and dawid.fatyga@gmail.com

Previously, pyfakefs used just this file from the mox3 library.
However, mox3 will soon be decommissioned, yet standard mock cannot
be used because of the problem described in pyfakefs #182 and
mock issue 250 (https://github.com/testing-cabal/mock/issues/250).
Therefore just this file was forked from mox3 and incorporated
into pyfakefs.
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       stubs.UnsetAll()

       The above changes os.path.exists into a lambda that returns 1.    Once
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