* @param docTypeName - the doc type to update
* @param replacement the new value
* @return the existing value
*/
public String updatePostProcessorName(String docTypeName, String replacement) {
DocumentTypeService documentTypeService = GlobalResourceLoader.getService("enDocumentTypeService");
DocumentType docTypeObj = DocumentType.from(documentTypeService.findByName(docTypeName));
String originalPostProcessorName = docTypeObj.getPostProcessorName();
docTypeObj.setPostProcessorName(replacement);
documentTypeService.save(docTypeObj);
return originalPostProcessorName;
}