core/src/main/java/org/sakaiproject/nakamura/lite/content/ContentManagerImpl.java
public InputStream getVersionInputStream(String path, String versionId) throws AccessDeniedException, StorageClientException,
            IOException {
        return getVersionInputStream(path, versionId, null);
    }
public InputStream getVersionInputStream(String path, String versionId) throws AccessDeniedException, StorageClientException,
            IOException {
        return getVersionInputStream(path, versionId, null);
    }
public InputStream getVersionInputStream ( String path , String versionId ) throws AccessDeniedException , StorageClientException , IOException { return getVersionInputStream ( path , versionId , null ) ; }
TODO: Unit test
TODO : Unit test