       @opponentSession = @opponentSessionResource.model
 
     if @session.loaded
-      console.debug 'LevelLoader: session already loaded:', @session
+      console.debug 'LevelLoader: session already loaded:', @session if LOG
       @session.setURL '/db/level.session/' + @session.id
       @loadDependenciesForSession @session
     else
-      console.debug 'LevelLoader: loading session:', @session
+      console.debug 'LevelLoader: loading session:', @session if LOG
       @listenToOnce @session, 'sync', ->
         @session.setURL '/db/level.session/' + @session.id
         @loadDependenciesForSession @session
     if @opponentSession
       if @opponentSession.loaded
+        console.debug 'LevelLoader: opponent session already loaded:', @opponentSession if LOG
         @loadDependenciesForSession @opponentSession
       else
+        console.debug 'LevelLoader: loading opponent session:', @opponentSession if LOG
         @listenToOnce @opponentSession, 'sync', @loadDependenciesForSession
 
   loadDependenciesForSession: (session) ->

    return 'not all session dependencies registered' if @sessionDependenciesRegistered and not @sessionDependenciesRegistered[@session.id] and not @sessionless
    return 'not all opponent session dependencies registered' if @sessionDependenciesRegistered and @opponentSession and not @sessionDependenciesRegistered[@opponentSession.id] and not @sessionless
    return 'session is not loaded' unless @session?.loaded or @sessionless
    return 'opponent session is not loaded' if @opponentSession and not @opponentSession.loaded
    return 'have not published level loaded' unless @publishedLevelLoaded or @sessionless
    return ''



  checkAllWorldNecessitiesRegisteredAndLoaded: ->
    reason = @getReasonForNotYetLoaded()
    console.debug('LevelLoader: Reason not loaded:', reason) if reason and LOG
    return !reason

  getReasonForNotYetLoaded: ->
