Code snippet showing how to define private class methods in Ruby.

private_class_method_v2.rb

class Toyota < Car
  class << self
    def name 
      i_am
    end
 
    private
 
    def i_am
      "Toyota #{superclass}"
    end
  end
end

# => Toyota.name
# "Toyota Car"
#
# => Toyota.i_am # expecting an error
# private method `i_am' called for Toyota:Class