serialize_broadcasting

# File actioncable/lib/action_cable/channel/broadcasting.rb, line 30
        def serialize_broadcasting(object) # :nodoc:
          case
          when object.is_a?(Array)
            object.map { |m| serialize_broadcasting(m) }.join(":")
          when object.respond_to?(:to_gid_param)
            object.to_gid_param
          else
            object.to_param
          end
        end