// For complete examples and data files, please go to https://github.com/groupdocs-assembly/GroupDocs.Assembly-for-Java
String srcDocument = "/Spreadsheet Templates/Multicolored Numbered List.xlsx";
String docReport = "/Spreadsheet Reports/Multicolored Numbered List_report.xlsx";
try {
DocumentAssembler assembler = new DocumentAssembler();
assembler.assembleDocument(CommonUtilities.getTestDataPath(srcDocument),
CommonUtilities.getTestOutPath(docReport), new DataStorage(), null);
} catch (Exception exp) {
System.out.println("Exception: " + exp.getMessage());
}