//he has to insert it to the sub document of docA and update the xlink:href link
docA.insertDocument(docB, "DOCB/");
//save
docA.save(TEST_FILE_FOLDER + TEST_FILE_EMBEDDED_SIDEBYSIDE_SAVE_OUT);
OdfDocument testLoad = OdfDocument.loadDocument(TEST_FILE_FOLDER + TEST_FILE_EMBEDDED_SIDEBYSIDE_SAVE_OUT);
OdfFileEntry imageEntry = testLoad.getPackage().getFileEntry(OdfPackage.OdfFile.IMAGE_DIRECTORY.getPath() + SLASH + TEST_PIC);
Assert.assertNotNull(imageEntry);
Map<String, OdfDocument> embDocs = testLoad.loadSubDocuments(OdfDocument.OdfMediaType.SPREADSHEET);
for(String embedDocPath : embDocs.keySet()){
OdfDocument doc1 = embDocs.get(embedDocPath);
imageEntry = doc1.getPackage().getFileEntry(doc1.getDocumentPath() + OdfPackage.OdfFile.IMAGE_DIRECTORY.getPath() + SLASH + TEST_PIC_ANOTHER);