# File src/ruby_supportlib/phusion_passenger/abstract_installer.rb, line 450
    def download(url, output, options = {})
      options[:logger] ||= begin
        logger = Logger.new(STDOUT)
        logger.level = Logger::WARN
        logger.formatter = proc { |severity, datetime, progname, msg| "*** #{msg}\n" }
        logger
      end
      return PhusionPassenger::Utils::Download.download(url, output, options)
    end