   ###
   removeTalkingParticipant: (nickname) ->
 
-    index = @state.talkingParticipants.indexOf nickname
-
-    unless index is -1
-      @state.talkingParticipants.splice index, 1
+    removeFromCollection @state.talkingParticipants, nickname, =>
       @emitChange()
 
 

    @emitChange()



  ###
  removeVideoActiveParticipant: (nickname) ->

    removeFromCollection @state.videoParticipants, nickname, =>
      @emitChange()


