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: test_win32ole_variant_outarg.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test/win32ole
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
begin
  require 'win32ole'
rescue Lo
    
def ado_csv_installed?
  installed = false
  if defined?(WIN32OLE)
    db = nil
    begin
      db = WIN32OLE.new('ADODB.Connection')
      db.connectionString = "Driver={Microsoft Text Driver (*.txt; *.csv)};DefaultDir=.;"
      db.open
      db.close
      db = nil
      installed = true
    rescue
    end