Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... setValue ( "This is a test of merging" ); //Save the Workbook.... setCellValue ( "This is a test of merging" ); sheet . addMergedRegion...