public void setTargetKeyPrefix(String targetKeyPrefix) {
        this.targetKeyPrefix = targetKeyPrefix;
    }
<p>
Specifies the folder prefix that you want the objects to be copied into. For example, to copy objects into a
folder named <code>Folder1</code> in the destination bucket, set the <code>TargetKeyPrefix</code> property to
<code>Folder1</code>.
</p>

@param targetKeyPrefix
       Specifies the folder prefix that you want the objects to be copied into. For example, to copy objects into
       a folder named <code>Folder1</code> in the destination bucket, set the <code>TargetKeyPrefix</code>
       property to <code>Folder1</code>.
aws-java-sdk-s3control/src/main/java/com/amazonaws/services/s3control/model/S3CopyObjectOperation.java