code: private String getSeverityIcon(FacesMessage message) {
  		if (message.getSeverity().equals(FacesMessage.SEVERITY_WARN))
  			return "fa fa-exclamation-triangle";
  		else if (message.getSeverity().equals(FacesMessage.SEVERITY_ERROR))
  			return "fa fa-times-circle";
  		else if (message.getSeverity().equals(FacesMessage.SEVERITY_FATAL))
  			return "fa fa-ban";
  		return "fa fa-info-circle";
  	}
docs: Get severity related icons.
  We use FA icons because future version of Bootstrap
  does not support glyphicons anymore
  @param message
  @return