public String getPrefix() {
        return prefix;
    }
Returns the optional prefix parameter that restricts the response to
multipart uploads for keys that begin with the specified prefix. Use
prefixes to separate a bucket into different sets of keys, similar to how
a file system organizes files into directories.

@return 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