export { createMultipartReplacer };
/**
 * Serialize `fileMetadata`/`blobMetadata`.
 *`onFile`/`onBlob` collect the file parts for the FormData.
 */
declare function createMultipartReplacer(callbacks: {
    onFile: (key: string, file: File) => void;
    onBlob: (key: string, blob: Blob) => void;
}): (_key: string, value: unknown, serializer: (v: unknown) => string) => {
    replacement: string;
    resolved: boolean;
} | undefined;