serialize_broadcasting

# File actioncable/lib/action_cable/channel/broadcasting.rb, line 29
          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