def is_filtered?(severity, message)
      if filters = MESSAGE_FILTERS[severity]
        filters.each do |filter|
          return true if filter =~ message
        end
      end
      return false
    end
def is_filtered?(severity, message)
      if filters = MESSAGE_FILTERS[severity]
        filters.each do |filter|
          return true if filter =~ message
        end
      end
      return false
    end
Filters any message which should not appear in audits.

 === Parameters
 severity(Constant):: One of Logger::DEBUG, Logger::INFO, Logger::WARN, Logger::ERROR or Logger::FATAL
 message(String):: Message to be audited