/**
 * instantiates the aws-sdk s3 client that will be used for s3 uploads.
 *
 * @param {object} companionOptions the companion options object
 * @param {boolean} createPresignedPostMode whether this s3 client is for createPresignedPost
 */
export default function s3Client(companionOptions: object, createPresignedPostMode?: boolean): S3Client;
import { S3Client } from '@aws-sdk/client-s3';