@param importerCache: a sys.path_importer_cache-like list of PEP-302
        importers.  This will be used in conjunction with the given
        sysPathHooks.

        @param moduleLoader: a module loader function which takes a string and
        returns a module.  That is to say, it is like L{namedAny} - *not* like
        L{__import__}.

        @param sysPathFactory: a 0-argument callable which returns the current
        value of a sys.path-like list of strings.  Specify either this, or
        sysPath, not both.  This alternative interface is provided because the
        way the Python import mechanism works, you can re-bind the 'sys.path'
        name and that is what is used for current imports, so it must be a
        factory rather than a value to deal with modification by rebinding
        rather than modification by mutation.  Note: it is not recommended to
        rebind sys.path.  Although this mechanism can deal with that, it is a
        subtle point which some tools that it is easy for tools which interact
        with sys.path to miss.
        Nc