code: private Level mapLogLevel(final LogLevel logLevel) {
  		if (LogLevel.DEBUG.equals(logLevel)) {
  			return Level.DEBUG;
  		} else if (LogLevel.TRACE.equals(logLevel)) {
  			return Level.TRACE;
  		} else if (LogLevel.INFO.equals(logLevel)) {
  			return Level.INFO;
  		} else if (LogLevel.WARN.equals(logLevel)) {
  			return Level.WARN;
  		} else if (LogLevel.ERROR.equals(logLevel)) {
  			return Level.ERROR;
  		}
  		return null;
  	}
docs: Map the plugin log level to logback log level.
  
  @param logLevel
  The plugin log level.
  @return The logback log level.