code: public void setWarningSeverity(String warningId, Severity severity) {
  		if (!Strings.isEmpty(warningId) && severity != null) {
  			this.issueSeverityProvider.setSeverity(warningId, severity);
  		}
  	}
docs: Change the severity level of a warning.
  
  @param warningId the identifier of the warning. If {@code null} or empty, this function does nothing.
  @param severity the new severity. If {@code null} this function does nothing.
  @since 0.5