I don't think there is a way to insert a cell left / right in a cell. If your cells and address are not dynamic, you can do the following
- Get content in the range A2-Y2 and put in an array
- 0,
- 2. A2-Z2.
URL cellFeedUrl1 = new URI(worksheets.get(WSID).getCellFeedUrl() +"?min-row=2&max-row=2&min-col=1&max-col=1").toURL();
CellFeed cellFeed1 = googleservice.getFeed(cellFeedUrl1, CellFeed.class);
for (CellEntry cell : cellFeed1.getEntries())
{ Array_A2Y2.add(cell.getPlainTextContent()); }