How to use the offlineimap.folder.Maildir.MaildirFolder function in offlineimap

def __init__(self, root, name, sep, repository):
        self.sep = sep # needs to be set before super().__init__
        super(MaildirFolder, self).__init__(name, repository)
        self.root = root
        # check if we should use a different infosep to support Win file systems
        self.wincompatible = self.config.getdefaultboolean(
            "Account "+self.accountname, "maildir-windows-compatible", False)
        self.infosep = '!' if self.wincompatible else ':'
        """infosep is the separator between maildir name and flag appendix"""
        self.re_flagmatch = re.compile('%s2,(\w*)'% self.infosep)
        #self.ui is set in BaseFolder.init()
        # Everything up to the first comma or colon (or ! if Windows):
        self.re_prefixmatch = re.compile('([^'+ self.infosep + ',]*)')
        # folder's md, so we can match with recorded file md5 for validity.
        self._foldermd5 = md5(self.getvisiblename()).hexdigest()
        # Cache the full folder path, as we use getfullname() very often.
        self._fullname = os.path.join(self.getroot(), self.getname())
        # Modification time from 'Date' header.
        utime_from_header_global = self.config.getdefaultboolean(

if not os.path.isdir(fullname):
                self.debug("  skipping this entry (not a directory)")
                # Not a directory -- not a folder.
                continue
            foldername = dirname
            if extension != None:
                foldername = os.path.join(extension, dirname)
            if (os.path.isdir(os.path.join(fullname, 'cur')) and
                os.path.isdir(os.path.join(fullname, 'new')) and
                os.path.isdir(os.path.join(fullname, 'tmp'))):
                # This directory has maildir stuff -- process
                self.debug("  This is a maildir folder.")

                self.debug("  foldername = %s" % foldername)

                retval.append(folder.Maildir.MaildirFolder(self.root, foldername,
                                                           self.getsep(), self, self.accountname))
            if self.getsep() == '/' and dirname != '.':
                # Check sub-directories for folders.
                retval.extend(self._getfolders_scandir(root, foldername))
        self.debug("_GETFOLDERS_SCANDIR RETURNING %s" % \
                   repr([x.getname() for x in retval]))
        return retval

#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA


import os
from sys import exc_info
from .Maildir import MaildirFolder
from offlineimap import OfflineImapError
import offlineimap.accounts
from offlineimap import imaputil

class GmailMaildirFolder(MaildirFolder):
    """Folder implementation to support adding labels to messages in a Maildir.
    """
    def __init__(self, root, name, sep, repository):
        super(GmailMaildirFolder, self).__init__(root, name, sep, repository)

        # The header under which labels are stored
        self.labelsheader = self.repository.account.getconf('labelsheader', 'X-Keywords')

        # enables / disables label sync
        self.synclabels = self.repository.account.getconfboolean('synclabels', 0)

        # if synclabels is enabled, add a 4th pass to sync labels
        if self.synclabels:
            self.syncmessagesto_passes.append(('syncing labels', self.syncmessagesto_labels))

    def quickchanged(self, statusfolder):

def getfolder(self, foldername):
        return folder.Maildir.MaildirFolder(self.root, foldername,
                                            self.getsep(), self, self.accountname)

def getfoldertype(self):
        return folder.Maildir.MaildirFolder

def getfolder(self, foldername):
        return folder.Maildir.MaildirFolder(self.root, foldername,
                                            self.getsep(), self, self.accountname)

if not os.path.isdir(fullname):
                self.debug("  skipping this entry (not a directory)")
                # Not a directory -- not a folder.
                continue
            foldername = dirname
            if extension != None:
                foldername = os.path.join(extension, dirname)
            if (os.path.isdir(os.path.join(fullname, 'cur')) and
                os.path.isdir(os.path.join(fullname, 'new')) and
                os.path.isdir(os.path.join(fullname, 'tmp'))):
                # This directory has maildir stuff -- process
                self.debug("  This is a maildir folder.")

                self.debug("  foldername = %s" % foldername)

                retval.append(folder.Maildir.MaildirFolder(self.root, foldername,
                                                           self.getsep(), self, self.accountname))
            if self.getsep() == '/':
                # Check sub-directories for folders.
                retval.extend(self._getfolders_scandir(root, foldername))
        self.debug("_GETFOLDERS_SCANDIR RETURNING %s" % \
                   repr([x.getname() for x in retval]))
        return retval