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: common.rb
    path of file: ./repos/natalie/spec/core/file/fixtures
    
    the code of the file until where you have to start completion: module FileSpecs
  class SubString < String; end

  def self.make_closer(obj, exc=nil)
    ScratchPad << :file_opened

    class << obj
      attr_accessor :close_exception

      alias_method :original_clos
    
  def self.make_closer(obj, exc=nil)
    ScratchPad << :file_opened

    class << obj
      attr_accessor :close_exception

      alias_method :original_close, :close

      def close
        original_close
        ScratchPad << :file_closed

        raise @close_exception if @close_exception
      end
    end