You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: configuration.rb
    path of file: ./repos/motion/lib/motion
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require "motion"

module Motion
  class Configurati
    
      def define_option_reader(option, &default)
        define_method(option) do
          if instance_variable_defined?(:"@#{option}")
            instance_variable_get(:"@#{option}")
          else
            instance_variable_set(:"@#{option}", instance_exec(&default))
          end
        end