Hanlde not found error for AWS HEAD request.swift

//  AWS-SDK-Swift
//
//  When you need to find if error is caused by resource not found,rather than other type of errors
//  such as network error or access permissions related error.   This is how to find, if this error
//  is cause of resource not found.  
//
//	Note:
//	I don't want to spend time for this next time, so I paste code snippet here for my future reference

	func processHeadRequest(s3client: S3Client, bucket: String, key: String) async throws {
		do {
			let result: HeadObjectOutputResponse = try await self.s3Client.headObject(input: HeadObjectInput(bucket: bucket, key: key))
			_ = result
		}
		catch {
			switch error {
			case let error1 as ClientRuntime.SdkError<AWSS3.HeadObjectOutputError>:
				switch error1 {
				case .client(let error2, _):
					switch error2 {
					case .retryError(let error3):
						switch error3 {
						case let error4 as SdkError<HeadObjectOutputError>:
							switch error4 {
							case .service(let error5, _):
								switch error5 {
								case .notFound(_):
									// code for not found
									return
								default:
									break
								}
							default:
								break
							}
							break
						default:
							break
						}
					default:
						break
					}
				default:
					break
				}
			default:
				break
			}
			throw error
		}
	}