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: sas.rb
    path of file: ./repos/rouge/lib/rouge/lexers
    
    the code of the file until where you have to start completion: # -*- coding: utf-8 -*- #

module Rouge
  module Lexers
    class SAS < RegexLexer
      title "SAS"
      desc "SAS (Statistical Analysis Software)"
      tag 'sas'
      filenames '*.sas'
      mimetypes 'application/x-sas', 'application/x-stat-sas', 'application/x-sas-syntax'

      def self.data
    
      def self.sas_macro_statements
        # from SAS 9.4 Macro Language Reference
        # Chapter 12
        @sas_macro_statements ||= Set.new %w(
          %COPY %DISPLAY %GLOBAL %INPUT %LET %MACRO %PUT %SYMDEL %SYSCALL
          %SYSEXEC %SYSLPUT %SYSMACDELETE %SYSMSTORECLEAR %SYSRPUT %WINDOW
          %ABORT %DO %TO %UNTIL %WHILE %END %GOTO %IF %THEN %ELSE %LOCAL
          %RETURN
          %INCLUDE %LIST %RUN
        )
        # Omitted:
        # %label: Identifies the destination of a %GOTO statement.
        # %MEND
      end