export declare function promiseMaybePotentiallyUnsafeDate(name: string, mixed: any): Promise<null | undefined | (Date)>;
export declare function promiseMaybeValidDate(name: string, mixed: any): Promise<null | undefined | (Date)>;
export declare function promiseMaybeBefore(name: string, mixed: any, x: Date): Promise<null | undefined | (Date)>;
export declare function promiseMaybeBeforeHandler(x: Date): (name: string, mixed: any) => Promise<null | undefined | (Date)>;
export declare function promiseMaybeAfter(name: string, mixed: any, x: Date): Promise<null | undefined | (Date)>;
export declare function promiseMaybeAfterHandler(x: Date): (name: string, mixed: any) => Promise<null | undefined | (Date)>;
export declare function promiseMaybeBeforeOrAt(name: string, mixed: any, x: Date): Promise<null | undefined | (Date)>;
export declare function promiseMaybeBeforeOrAtHandler(x: Date): (name: string, mixed: any) => Promise<null | undefined | (Date)>;
export declare function promiseMaybeAfterOrAt(name: string, mixed: any, x: Date): Promise<null | undefined | (Date)>;
export declare function promiseMaybeAfterOrAtHandler(x: Date): (name: string, mixed: any) => Promise<null | undefined | (Date)>;
export declare function promiseMaybeRange(name: string, mixed: any, args: {
    min?: Date;
    max?: Date;
}): Promise<null | undefined | (Date)>;
export declare function promiseMaybeRangeHandler(args: {
    min?: Date;
    max?: Date;
}): (name: string, mixed: any) => Promise<null | undefined | (Date)>;