import type { AssistantStreamChunk } from "../../AssistantStreamChunk.js";
export declare class PathAppendEncoder extends TransformStream<AssistantStreamChunk, AssistantStreamChunk> {
    constructor(idx: number | {
        value: number | undefined;
        promise: Promise<number>;
    });
}
export declare class PathAppendDecoder extends TransformStream<AssistantStreamChunk, AssistantStreamChunk> {
    constructor(idx: number);
}
export declare const createPathMergeMapper: (nextPartIndex: () => number) => ((chunk: AssistantStreamChunk) => AssistantStreamChunk);
//# sourceMappingURL=path-utils.d.ts.map