How to use the martor.utils.LazyEncoder function in martor

})
            return HttpResponse(
                json.dumps(data, cls=LazyEncoder),
                content_type='application/json')
        data.update({
            'status': 204,
            'error': _('No users registered as `%(username)s` '
                       'or user is unactived.') % {'username': username}
        })
    else:
        data.update({
            'status': 204,
            'error': _('Validation Failed for field `username`')
        })
    return HttpResponse(
        json.dumps(data, cls=LazyEncoder),
        content_type='application/json')

"""
    data = {}
    username = request.GET.get('username')
    if username is not None \
            and username != '' \
            and ' ' not in username:
        users = User.objects.filter(
            Q(username__icontains=username)
        ).filter(is_active=True)
        if users.exists():
            data.update({
                'status': 200,
                'data': [{'username': u.username} for u in users]
            })
            return HttpResponse(
                json.dumps(data, cls=LazyEncoder),
                content_type='application/json')
        data.update({
            'status': 204,
            'error': _('No users registered as `%(username)s` '
                       'or user is unactived.') % {'username': username}
        })
    else:
        data.update({
            'status': 204,
            'error': _('Validation Failed for field `username`')
        })
    return HttpResponse(
        json.dumps(data, cls=LazyEncoder),
        content_type='application/json')

def default(self, obj):
        if isinstance(obj, Promise):
            return force_text(obj)
        return super(LazyEncoder, self).default(obj)