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

def handleMatch(self, m):
        emoji = self.unescape(m.group(2))
        if emoji not in EMOJIS:
            return emoji
        url = '{0}{1}.png'.format(
            MARTOR_MARKDOWN_BASE_EMOJI_URL, emoji.replace(':', '')
        )
        if MARTOR_MARKDOWN_BASE_EMOJI_USE_STATIC is True:
            url = static(url)
        el = markdown.util.etree.Element('img')
        el.set('src', url)
        el.set('class', 'marked-emoji')
        el.text = markdown.util.AtomicString(emoji)
        return el

def render(self, name, value, attrs=None, renderer=None, **kwargs):
        # Make the settings the default attributes to pass
        attributes_to_pass = {
            'data-enable-configs': MARTOR_ENABLE_CONFIGS,
            'data-upload-url': MARTOR_UPLOAD_URL,
            'data-markdownfy-url': MARTOR_MARKDOWNIFY_URL,
            'data-search-users-url': MARTOR_SEARCH_USERS_URL,
            'data-base-emoji-url': MARTOR_MARKDOWN_BASE_EMOJI_URL
        }

        # Make sure that the martor value is in the class attr passed in
        if 'class' in attrs:
            attrs['class'] += ' martor'
        else:
            attrs['class'] = 'martor'

        # Update and overwrite with the attributes passed in
        attributes_to_pass.update(attrs)

        # Update and overwrite with any attributes that are on the widget
        # itself. This is also the only way we can push something in without
        # being part of the render chain.
        attributes_to_pass.update(self.attrs)