code: public static final void setJavolutionLogLevel(org.slf4j.Logger log) {
      // disable Javolution info-level logging
      if (log.isTraceEnabled()) {
        javolution.context.LogContext.enter().setLevel(LogContext.Level.DEBUG);
      } else if (log.isDebugEnabled()) {
        javolution.context.LogContext.enter().setLevel(LogContext.Level.DEBUG);
      } else if (log.isInfoEnabled()) {
        javolution.context.LogContext.enter().setLevel(LogContext.Level.INFO);
      } else if (log.isWarnEnabled()) {
        javolution.context.LogContext.enter().setLevel(LogContext.Level.WARNING);
      } else if (log.isErrorEnabled()) {
        javolution.context.LogContext.enter().setLevel(LogContext.Level.ERROR);
      } else {
        javolution.context.LogContext.enter().setLevel(LogContext.Level.FATAL);
      }
    }
docs: Set Javolution log level according to the provided logger.
  
  @param log SLF4J wrapper for many logging frameworks