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

private_class_method_v3a.rb

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

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