This class is deprecated because of potential issues with marshalling and unmarshalling this type when used in RESTful APIs.
When you want to represent a collection of Document documents), please use the {@link DocumentCollection} interface and the
{@link DocumentCollectionImpl} implementation class.
This a Sample Implementation of the DocumentStorageService saves the uploaded files on the File System on a folder (by default /docs)
and return the complete path to the file that will be stored in the form field property.