return responseBody;
}
private String getBoundary(final String contentType) throws BatchException {
Scanner contentTypeScanner = new Scanner(contentType);
contentTypeScanner.useDelimiter(";\\s?");
if (contentTypeScanner.hasNext(REG_EX_CONTENT_TYPE)) {
contentTypeScanner.next(REG_EX_CONTENT_TYPE);
} else {
contentTypeScanner.close();
throw new BatchException(BatchException.INVALID_CONTENT_TYPE.addContent(HttpContentType.MULTIPART_MIXED));