isp_good_example.rb

require ‘forwardable’

class Blog
  def edit_post
    puts “Post edited”
  end

  def delete_post
    puts “Post removed”
  end

  def create_post
    puts “Post created”
  end
end

class Moderator
  extend Forwardable
  def_delegators :@blog, :edit_post

  def initialize(blog)
    @blog = blog
  end
end

moderator = Moderator.new(Blog.new)
moderator.edit_post
moderator.delete_post