How to use the apicurio-data-models.ValidationProblemSeverity.low function in apicurio-data-models

Object.getOwnPropertyNames(severities).forEach( key => {
            let value: string = severities[key];
            let severity: ValidationProblemSeverity = ValidationProblemSeverity.low;
            switch (value) {
                case "ignore": severity = ValidationProblemSeverity.ignore; break;
                case "low": severity = ValidationProblemSeverity.low; break;
                case "medium": severity = ValidationProblemSeverity.medium; break;
                case "high": severity = ValidationProblemSeverity.high; break;
            }
            rval[key] = severity;
        });
        return rval;

    low(): ValidationProblemSeverity { return ValidationProblemSeverity.low; }

public lookupSeverity(rule: ValidationRuleMetaData): ValidationProblemSeverity {
        if (this.severities[rule.code] !== undefined) {
            return this.severities[rule.code];
        }
        return ValidationProblemSeverity.low;
    }

public iconFor(problem: ValidationProblem): string {
        switch (problem.severity) {
            case ValidationProblemSeverity.low:
                return "pficon-info";
            case ValidationProblemSeverity.medium:
                return "pficon-warning-triangle-o";
            case ValidationProblemSeverity.high:
                return "pficon-error-circle-o";
            default:
                return "pficon-info";
        }
    }

public iconFor(problem: ValidationProblem): string {
        switch (problem.severity) {
            case ValidationProblemSeverity.low:
                return "pficon-info";
            case ValidationProblemSeverity.medium:
                return "pficon-warning-triangle-o";
            case ValidationProblemSeverity.high:
                return "pficon-error-circle-o";
            default:
                return "";
        }
    }

Object.getOwnPropertyNames(severities).forEach( key => {
            let value: string = severities[key];
            let severity: ValidationProblemSeverity = ValidationProblemSeverity.low;
            switch (value) {
                case "ignore": severity = ValidationProblemSeverity.ignore; break;
                case "low": severity = ValidationProblemSeverity.low; break;
                case "medium": severity = ValidationProblemSeverity.medium; break;
                case "high": severity = ValidationProblemSeverity.high; break;
            }
            rval[key] = severity;
        });
        return rval;

public iconFor(problem: ValidationProblem): string {
        switch (problem.severity) {
            case ValidationProblemSeverity.low:
                return "pficon-info";
            case ValidationProblemSeverity.medium:
                return "pficon-warning-triangle-o";
            case ValidationProblemSeverity.high:
                return "pficon-error-circle-o";
            default:
                return "";
        }
    }