module DocumentFunctions
  module InstanceMethods
    # returns the word that is currently touched by the cursor
    def word_touching_cursor
 
    end
  end
 
  def self.included(receiver)
    receiver.send :include, InstanceMethods
  end
end
 
module DocumentManipulator
 
  module InstanceMethods
    def document
 
    end
 
    # replace a range with the given text.
    def replace_range(start_offset, stop_offset, text)
 
    end
  end
 
  def self.included(receiver)
    receiver.send :include, InstanceMethods
  end
 
end
 
module SelectionManipulator
  include DocumentFunctions
 
  module InstanceMethods
 
    def selection
 
    end
  end
 
  def self.included(receiver)
    receiver.send :include, InstanceMethods
  end
 
end
 
class FooCommand
  include SelectionManipulator
 
  def run
    (self.methods - Object.new.methods).each do |method|
      puts method
    end
  end
end
 
FooCommand.new.run