def METHOD_NAME(self):
    items = []
    feed = self.feed()
    render_body = feed.settings.render_body
    for item in feed.items:
        json_item = {
            'title': item.title,
            'description': item.description,
            'url': item.link,
            'modified': item.modified.ISO8601(),
            'file_url': item.file_type and item.file_url,
            'file_type': item.file_type,
            'file_length': item.file_length,
            'image_url': item.image_url,
            'uid': feed.uid
        }
        if render_body:
            json_item['body'] = item.render_content_core()
        items.append(json_item)
    return json.dumps({
        'url': feed.link,
        'title': feed.title,
        'description': feed.description,
        'modified': feed.modified.ISO8601(),
        'uid': feed.uid,
        'logo': feed.logo,
        'items': items
    })