def restore_levels
      synchronize do
        @original_outputter_levels.each do |name, level|
          outputter = Log4r::Outputter[name]
          outputter.level = level if outputter.level != level
        end
        @original_outputter_levels.clear
        
        @original_levels.each do |name, level|
          logger = Lumber.find_or_create_logger(name)
          logger.level = level if logger.level != level
        end
        @original_levels.clear
      end
    end
def restore_levels
      synchronize do
        @original_outputter_levels.each do |name, level|
          outputter = Log4r::Outputter[name]
          outputter.level = level if outputter.level != level
        end
        @original_outputter_levels.clear
        
        @original_levels.each do |name, level|
          logger = Lumber.find_or_create_logger(name)
          logger.level = level if logger.level != level
        end
        @original_levels.clear
      end
    end
Restores original values of logger levels after expiration