docs: def search(self, **kwargs):
          """
          Query using ElasticSearch, returning an elasticsearch queryset.
  
          :param kwargs: keyword arguments (optional)
           * query : ES Query spec
           * tags : content tags
           * types : content types
           * feature_types : featured types
           * published : date range
          """
          search_query = super(ContentManager, self).search()
  
          if "query" in kwargs:
              search_query = search_query.query("match", _all=kwargs.get("query"))
          else:
              search_query = search_query.sort('-published', '-last_modified')
  
          # Right now we have "Before", "After" (datetimes),
          # and "published" (a boolean). Should simplify this in the future.
          if "before" in kwargs or "after" in kwargs:
              published_filter = Published(before=kwargs.get("before"), after=kwargs.get("after"))
              search_query = search_query.filter(published_filter)
          else:
              # TODO: kill this "published" param. it sucks
              if kwargs.get("published", True) and "status" not in kwargs:
                  published_filter = Published()
                  search_query = search_query.filter(published_filter)
  
          if "status" in kwargs:
              search_query = search_query.filter(Status(kwargs["status"]))
  
          if "excluded_ids" in kwargs:
              exclusion_filter = ~es_filter.Ids(values=kwargs.get("excluded_ids", []))
              search_query = search_query.filter(exclusion_filter)
  
          tag_filter = Tags(kwargs.get("tags", []))
          search_query = search_query.filter(tag_filter)
  
          author_filter = Authors(kwargs.get("authors", []))
          search_query = search_query.filter(author_filter)
  
          feature_type_filter = FeatureTypes(kwargs.get("feature_types", []))
          search_query = search_query.filter(feature_type_filter)
  
          # Is this good enough? Are we even using this feature at all?
          types = kwargs.pop("types", [])
          if types:
              search_query._doc_type = types
          return search_query