       return false
 
     return true
+
+
+  ###
+   * (private) Model Update Timestamps
+   *
+   * Handle timestamps for an update event
+   *
+   * - classname (string)
+   * - id (string)
+   * - changes (object)
+   * - timestamps (object)
+   * > timestamps
+  ###
 
   model_update_timestamps: (classname, id, changes, timestamps) ->
 

      delete changes.tasks
      delete timestamps.tasks

    return @model_update_save(LIST, id, changes, timestamps)

  pref_update: (changes, timestamps) =>

    # Pref id is always s0
    id = PREF_ID

    # Set timestamp
    if timestamps
      for attr, time of timestamps
        old = @time.get PREF, id, attr
        if old > time
          delete timestamps[attr]
          delete changes[attr]
      if Object.keys(changes).length is 0
        warn '[pref] [update] old event', id
        return null
    else
      timestamps = {}
      now = Date.now()
      for key of changes
        timestamps[key] = now

    @time.set PREF, id, timestamps

    # Save to server
    model = @user.updateModel PREF, id, changes
    log '[pref] updated', changes

    return changes




      warn '[task] [update] timestamps is null'
      return null

    @model_update_save(TASK, id, changes, timestamps)

    changes.id = id
    return changes



  ###
