import { ErrorUnion, TextUnion } from '../outputs';
/**
 * Returns the MIME type of a file, guessed by its extension. Returns an empty string
 * on failure. This is an offline method. Can be called before authorization. Can be
 * called synchronously
 * @param {Object} params
 * @param {string} [params.fileName] - The name of the file or path to the file
 * @param {Object} state
 * @returns {TextUnion | ErrorUnion}
 */
export declare type GetFileMimeTypeMethod = <ResponseT = TextUnion>(params: GetFileMimeTypeParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface GetFileMimeTypeParams {
    /** The name of the file or path to the file */
    fileName?: string;
}