export declare function requireNonEmptyText(value: string, fieldName: string): string;
export declare function requireStringRecord(fields: Record<string, string>, fieldName: string): Readonly<Record<string, string>>;
export declare function freezeSortedRecord(fields: Record<string, string>): Readonly<Record<string, string>>;
export declare function freezeSortedTexts(values: readonly string[], fieldName: string): readonly string[];
export declare function requireNonNegativeInteger(value: number, fieldName: string): number;
