fork-ts-checker-webpack-plugin/lib/issue/issue-severity.d.ts

declare type IssueSeverity = 'error' | 'warning';
declare function isIssueSeverity(value: unknown): value is IssueSeverity;
declare function compareIssueSeverities(severityA: IssueSeverity, severityB: IssueSeverity): number;
export { IssueSeverity, isIssueSeverity, compareIssueSeverities };