func copyPart(params *s3.UploadPartCopyInput, partNumber int, client *s3.S3, notify chan<- s3.CompletedPart) {
fmt.Println("STARTING", partNumber, *params.CopySourceRange)
respUploadPartCopy, err1 := client.UploadPartCopy(params)
if err1 != nil {
fmt.Println("ERROR UploadPartCopy", err1)
panic(err1)
}
fmt.Println("SUCCESSS CopyPartResult", partNumber, *respUploadPartCopy.CopyPartResult.ETag)
notify <- s3.CompletedPart{ETag: aws.String(*respUploadPartCopy.CopyPartResult.ETag), PartNumber: aws.Long(int64(partNumber))}
}