How to use the martor.settings.MARTOR_ENABLE_CONFIGS function in martor

def handleMatch(self, m):
        username = self.unescape(m.group(2))

        """Makesure `username` is registered and actived."""
        if MARTOR_ENABLE_CONFIGS['mention'] == 'true':
            if username in [u.username for u in User.objects.exclude(is_active=False)]:
                url = '{0}{1}/'.format(MARTOR_MARKDOWN_BASE_MENTION_URL, username)
                el = markdown.util.etree.Element('a')
                el.set('href', url)
                el.set('class', 'direct-mention-link')
                el.text = markdown.util.AtomicString('@' + username)
                return el

'martor/css/martor.min.css',
                'martor/css/martor-admin.min.css'
            )
        }
        js = (
            'plugins/js/ace.js',
            'plugins/js/semantic.min.js',
            'plugins/js/mode-markdown.js',
            'plugins/js/ext-language_tools.js',
            'plugins/js/theme-github.js',
            'plugins/js/highlight.min.js',
            'plugins/js/resizable.min.js',
            'plugins/js/emojis.min.js',
            'martor/js/martor.min.js',
        )
        if MARTOR_ENABLE_CONFIGS['jquery'] == 'true':
            js = ('plugins/js/jquery.min.js',).__add__(js)


class AdminMartorWidget(MartorWidget, widgets.AdminTextareaWidget):
    pass