code: private static S3Recoverable castToS3Recoverable(CommitRecoverable recoverable) {
  		if (recoverable instanceof S3Recoverable) {
  			return (S3Recoverable) recoverable;
  		}
  		throw new IllegalArgumentException(
  				"S3 File System cannot recover recoverable for other file system: " + recoverable);
  	}
docs: --------------------------- Utils ---------------------------