.rb

module Helper
  attr_reader :value

	def Helper.included(parent)
		parent.set_default_val
	end
	
	def set_default_val
	  @value = 42
	end
end

class MyClass
  include Helper
end

MyClass.new.value #=> 42

# Can I achieve this? Right now it fails with 
# undefined method 'set_value' for MyClass
# I understand this error, 'parent' references the prototype of MyClass not an instance of the MyClass, but can I alter
# @value for that instance?