     return selector
 
 
-  # Create an object containing @commands and @selectors.
+  # Create an object containing @_commands and @_selectors.
   # @private
   #
   # @return [Object] An object consisting of commands and selectors.

  _selectors: null


  # Add a command to _commands.
  # @private
  #
  # @param command [Array]

    @_commands.push command


  # Add a selector to @_selectors, if not already in the list.
  # @private
  #
  # @param selector [String] A selector.
