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: fields.rb
    path of file: ./repos/netsuite/lib/netsuite/support
    
    the code of the file until where you have to start completion: module NetSuite
  module Support
    module Fields
      incl
    
        def read_only_fields(*args)
          if args.empty?
             @read_only_fields ||= Set.new
          else
            args.each do |arg|
              read_only_field arg
            end
          end