# File lib/flowdock.rb, line 172
    def post_to_thread(thread)
      raise InvalidParameterError, "missing flow_token" if blank?(@flow_token)
      resp = self.class.post(api_url("/messages"),
                             body: MultiJson.dump(thread.merge(flow_token: @flow_token)),
                             headers: headers)
      handle_response resp
    end