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....first three columns ( from 0 to 2 ) and making them hidden by passing...true cells . groupColumns ( 0 , 2 , True ) # Saving the modified...