   Section: Gutter Destruction
   ###
 
-  # Public: Destroys the gutter.
+  # Essential: Destroys the gutter.
   destroy: ->
     if @name is 'line-number'
       throw new Error('The line-number gutter cannot be destroyed.')

  Section: Event Subscription
  ###

  # Public: Calls your `callback` when the gutter's visibility changes.
  #
  # * `callback` {Function}
  #  * `gutter` The gutter whose visibility changed.

  onDidChangeVisible: (callback) ->
    @emitter.on 'did-change-visible', callback

  # Essential: Calls your `callback` when the gutter is destroyed.
  #
  # * `callback` {Function}
  #
