/**
 *  @internal
 *  @module Utils
 */
export type Transformer = (...args: any[]) => string;
export declare const toCamelCase: (key: string) => string;
export declare const toSnakeCase: (key: string) => string;
export declare const isBlob: (data: unknown) => data is Blob;
export declare const transformKeys: <Data = Record<string, unknown> | unknown[]>(obj: Data, transformer: Transformer, ignoreKeys?: string[]) => Data;