docs: def search_topics(self, query, **qualifiers):
          """
          :calls: `GET /search/topics <http://developer.github.com/v3/search>`_
          :param query: string
          :param qualifiers: keyword dict query qualifiers
          :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.Topic.Topic`
          """
          assert isinstance(query, (str, unicode)), query
          url_parameters = dict()
  
          query_chunks = []
          if query:  # pragma no branch (Should be covered)
              query_chunks.append(query)
  
          for qualifier, value in qualifiers.items():
              query_chunks.append("%s:%s" % (qualifier, value))
  
          url_parameters["q"] = ' '.join(query_chunks)
          assert url_parameters["q"], "need at least one qualifier"
  
          return github.PaginatedList.PaginatedList(
              github.Topic.Topic,
              self.__requester,
              "/search/topics",
              url_parameters,
              headers={
                  "Accept": Consts.mediaTypeTopicsPreview
              }
          )