Mixins on instances

instanceMixins.rb

class MyObject
	def instanceMethod
		"MyObject"
	end
end

module MyMixin
	def instanceMethod
		"MyMixin"
	end

	def mixinMethod
	end
end

a = MyObject.new
b = MyObject.new

b.extend MyMixin

puts b.respond_to? :mixinMethod # => true
puts a.respond_to? :mixinMethod # => false

puts a.instanceMethod # => MyObject
puts b.instanceMethod # => MyMixin