@Override
    public File getFile() {
        return file;
    }
Returns the file containing the data to upload. Exactly one File or
InputStream must be specified as the input to this operation.

@return The file containing the data to upload. Exactly one File or
        InputStream must be specified as the input to this operation.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/UploadPartRequest.java