public void setPrefix(String prefix) {
        this.prefix = prefix;
    }
Sets the optional prefix parameter, restricting the response to multipart
uploads for keys that begin with the specified prefix.

@param prefix
           The optional prefix parameter, restricting the response to
           multipart uploads for keys that begin with the specified
           prefix.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/ListMultipartUploadsRequest.java