import { Optional } from "../../types";
export declare type PickValueMethod = "first_non_null" | "the_only_non_null" | "all_non_null";
export declare class PickValue {
    value: PickValueMethod;
    readonly originalValue: Optional<PickValueMethod>;
    constructor(value?: PickValueMethod);
    toString(): PickValueMethod;
    serialize(): Optional<PickValueMethod>;
}