Simple pattern for how to write modules

extend_pattern.rb

module ExtendThroughInclude

  def included(klass)
    klass.extend(ClassMethods)
    klass.send(:include, InstanceMethods)
  end

  
  class InstanceMethods
  end

  class ClassMethods
  end
end

TargetClass.send(:include, "ExtendThroughInclude")