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);
    }
TODO: Unit test