code: public String getLoggerLevelCss(String prefix, Level level) {
  		if (null == prefix) {
  			prefix = "";
  		} else {
  			prefix += "-";
  		}
  		if (level.intLevel() == StandardLevel.TRACE.intLevel()) {
  			return prefix + "info";
  		}
  		if (level.intLevel() == StandardLevel.DEBUG.intLevel()) {
  			return prefix + "primary";		
  		}
  		if (level.intLevel() == StandardLevel.INFO.intLevel()) {
  			return prefix + "success";
  		}
  		if (level.intLevel() == StandardLevel.WARN.intLevel()) {
  			return prefix + "warning";
  		}
  		if (level.intLevel() == StandardLevel.ERROR.intLevel()) {
  			return prefix + "danger";
  		}
  		if (level.intLevel() == StandardLevel.FATAL.intLevel()) {
  			return prefix + "muted";
  		}
  		if (level.intLevel() == StandardLevel.OFF.intLevel()) {
  			return prefix + "muted";
  		}
  		return "";
  	}
docs: returns the a css class with optional prefix for the particular log level.<br>
  if prefix is set result will be &lt;prefix&gt;-&lt;css-class&gt;
  
  @param prefix (optional) a prefic
  @param level the log level
  @return