How to use the zulip.integrations.perforce.git_p4.P4UserMap function in zulip

changed = True
                    if self.verbose:
                        print("%s is at %s ; rewinding towards %s" % (ref, change, maxChange))
                    system("git update-ref %s \"%s^\"" % (ref, ref))
                    log = extractLogMessageFromGitCommit(ref)
                    settings =  extractSettingsGitLog(log)

                    depotPaths = settings['depot-paths']
                    change = settings['change']

                if changed:
                    print("%s rewound to %s" % (ref, change))

        return True

class P4Submit(Command, P4UserMap):

    conflict_behavior_choices = ("ask", "skip", "quit")

    def __init__(self):
        Command.__init__(self)
        P4UserMap.__init__(self)
        self.options = [
                optparse.make_option("--origin", dest="origin"),
                optparse.make_option("-M", dest="detectRenames", action="store_true"),
                # preserve the user, requires relevant p4 permissions
                optparse.make_option("--preserve-user", dest="preserveUser", action="store_true"),
                optparse.make_option("--export-labels", dest="exportLabels", action="store_true"),
                optparse.make_option("--dry-run", "-n", dest="dry_run", action="store_true"),
                optparse.make_option("--prepare-p4-only", dest="prepare_p4_only", action="store_true"),
                optparse.make_option("--conflict", dest="conflict_behavior",
                                     choices=self.conflict_behavior_choices),

for depotFile in fileArgs:
            if depotFile not in self.client_spec_path_cache:
                self.client_spec_path_cache[depotFile] = ""

    def map_in_client(self, depot_path):
        """Return the relative location in the client where this
           depot file should live.  Returns "" if the file should
           not be mapped in the client."""

        if depot_path in self.client_spec_path_cache:
            return self.client_spec_path_cache[depot_path]

        die( "Error: %s is not found in client spec path" % depot_path )
        return ""

class P4Sync(Command, P4UserMap):
    delete_actions = ( "delete", "move/delete", "purge" )

    def __init__(self):
        Command.__init__(self)
        P4UserMap.__init__(self)
        self.options = [
                optparse.make_option("--branch", dest="branch"),
                optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
                optparse.make_option("--changesfile", dest="changesFile"),
                optparse.make_option("--silent", dest="silent", action="store_true"),
                optparse.make_option("--detect-labels", dest="detectLabels", action="store_true"),
                optparse.make_option("--import-labels", dest="importLabels", action="store_true"),
                optparse.make_option("--import-local", dest="importIntoRemotes", action="store_false",
                                     help="Import into refs/heads/ , not refs/remotes"),
                optparse.make_option("--max-changes", dest="maxChanges"),
                optparse.make_option("--keep-path", dest="keepRepoPath", action='store_true',