   #helper method to showSummary
   summarizeKnownObjects: ->
     objectsData = @Subject.current?.metadata?.known_objects
-    processedKnowns = new Object  
+    processedKnowns = new Object
     #known object names will be concatentated here
     allKnownsLabel = ""
 
     for frame, objects of objectsData
-      for knownObject in objects  when knownObject.good_known 
+      for knownObject in objects  when knownObject.good_known
         objectName = knownObject.object
-      
+
         #update if seen already
         if processedKnowns[objectName]
           @updateSeenObject(processedKnowns[objectName], knownObject)

           #append the object name to the label
          allKnownsLabel += objectName
      #if we found known object show message
    
    #display the known objects message message only if 
    @knownAsteroidMessage.show() if Object.keys(processedKnowns).length > 0
    
    #write out the object names of good knowns 
    @el.find("#metadata-knowns").html allKnownsLabel

    #for each known object

  activateFrame: (frame) ->
    @setAsteroidFrame(frame)
    classifier.el.find(".asteroid-frame-#{frame}").addClass 'current-asteroid-frame'
    return if @notInFlickerView()
    @showFrame(frame)
    @el.attr 'data-on-frame', frame
    @nextFrame.prop 'disabled', if frame is (@numFrames-1) then true else false
