export interface MigrationWarningInput {
    currentVersion: string;
    cacheFile?: string;
}
export interface MigrationWarningResult {
    warning: string | null;
    previousVersion: string | null;
}
export declare function readMigrationWarning(input: MigrationWarningInput): MigrationWarningResult;
export interface MigrationPersistInput {
    currentVersion: string;
    cacheFile?: string;
}
export declare function persistCurrentVersion(input: MigrationPersistInput): void;