export declare function isObject(input: unknown): input is Record<string, any>;
export declare function isStream(input: unknown): boolean;
export declare function isFormData(input: unknown): input is FormData;
export declare function isArrayBuffer(input: unknown): input is ArrayBuffer;
export declare function isFile(input: unknown): input is File;
export declare function isBlob(input: unknown): input is Blob;
export declare function isURLSearchParams(input: unknown): boolean;