broadcasting_for

# File actioncable/lib/action_cable/channel/broadcasting.rb, line 18
        def broadcasting_for(model) #:nodoc:
          case
          when model.is_a?(Array)
            model.map { |m| broadcasting_for(m) }.join(":")
          when model.respond_to?(:to_gid_param)
            model.to_gid_param
          else
            model.to_param
          end
        end