import { MergeStageInterface, WhenMatchedType, WhenNotMatchedType, StageInterface } from "../../interfaces";
export declare const IntoPayload: (into: string | {
    [key: string]: string;
}, optional?: {
    on?: string | string[] | undefined;
    whenMatched?: StageInterface[] | WhenMatchedType | undefined;
    letWhenMatched?: {
        [key: string]: any;
    } | undefined;
    whenNotMatched?: WhenNotMatchedType | undefined;
} | undefined) => MergeStageInterface;