export declare function isJsonValue(value: unknown): boolean;
export declare function isNullableBoolean(value: unknown): value is boolean | null | undefined;
export declare function isNullableFiniteNumber(value: unknown): value is number | null | undefined;
export declare function isNullableJsonValue(value: unknown): boolean;
export declare function isNullableString(value: unknown): value is string | null | undefined;
export declare function isRecordOf<TValue>(value: unknown, predicate: (entry: unknown) => entry is TValue): value is Record<string, TValue>;