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: light_config.rb
    path of file: ./repos/sunspot/sunspot/lib
    
    the code of the file until where you have to start completion: module LightConfig
  class Configuration
    def initialize(&block)
      @properties = {}
      ::LightConfig::Builder.new(self).instance_eval(&block)
      singleton = (class <<self; self; end)
      @properties.keys.each do |property|
        singleton.module_eva
    
    def initialize(&block)
      @properties = {}
      ::LightConfig::Builder.new(self).instance_eval(&block)
      singleton = (class <<self; self; end)
      @properties.keys.each do |property|
        singleton.module_eval do
          define_method property do
            @properties[property]
          end

          define_method "#{property}=" do |value|
            @properties[property] = value
          end
        end
      end
    end