export declare function promiseMaybeArray(name: string, mixed: any): Promise<null | undefined | (any[])>;
export declare function promiseMaybeMinLength(name: string, mixed: any, min: number): Promise<null | undefined | (any[])>;
export declare function promiseMaybeMinLengthHandler(min: number): (name: string, mixed: any) => Promise<null | undefined | (any[])>;
export declare function promiseMaybeMaxLength(name: string, mixed: any, max: number): Promise<null | undefined | (any[])>;
export declare function promiseMaybeMaxLengthHandler(max: number): (name: string, mixed: any) => Promise<null | undefined | (any[])>;
export declare function promiseMaybeLength(name: string, mixed: any, args: {
    min?: number;
    max?: number;
}): Promise<null | undefined | (any[])>;
export declare function promiseMaybeLengthHandler(args: {
    min?: number;
    max?: number;
}): (name: string, mixed: any) => Promise<null | undefined | (any[])>;
export declare function promiseMaybeNonEmpty(name: string, mixed: any): Promise<null | undefined | (any[])>;
export declare function promiseMaybeContains(name: string, mixed: any, x: any): Promise<null | undefined | (any[])>;
export declare function promiseMaybeContainsHandler(x: any): (name: string, mixed: any) => Promise<null | undefined | (any[])>;
export declare function promiseMaybeNoDuplicate(name: string, mixed: any): Promise<null | undefined | (any[])>;