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: flags.rb
    path of file: ./repos/script_core/ext/enterprise_script_service
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Flags
  class <<
    
    def io_safe_defines
      %w[
        _GNU_SOURCE
        MRB_USE_DEBUG_HOOK
        MRB_INT64
        MRB_UTF8_STRING
        MRB_WORD_BOXING
        YYDEBUG
      ]
    end