method S3Client.prototype.existsimport { S3Client } from "https://deno.land/x/s3_lite_client@0.6.1/mod.ts"; exists(objectName: string, options?: { bucketName?: string; versionId?: string; }): Promise<boolean>Check if an object with the specified key exists. ParametersobjectName: stringoptionaloptions: { bucketName?: string; versionId?: string; }ReturnsPromise<boolean>