new

# File activesupport/lib/active_support/tagged_logging.rb, line 63
    def self.new(logger)
      logger = logger.dup

      if logger.formatter
        logger.formatter = logger.formatter.dup
      else
        # Ensure we set a default formatter so we aren't extending nil!
        logger.formatter = ActiveSupport::Logger::SimpleFormatter.new
      end

      logger.formatter.extend Formatter
      logger.extend(self)
    end