Visibility of a method

By default methods within a class in Ruby is PUBLIC. But as we know, ruby supports meta programming and hence a new/updated code can be generated on fly during the runtime.
here is a way to make the public class methods to private.

class Myclass
  def mymethod
    puts "I am public and wishing to be private!"
  end
  private :mymethod
  # OR also can be written as 
  # private_class_method :mymethod
end

obj = Myclass.new
obj.mymethod 
# private method `mymethod' called for # (NoMethodError)

Similary public :mymethod or public_class_method :mymethod