StandardRealm<SheetNode, SpreadsheetBook> realm = SpreadsheetSessionManager.getInstance().getOrCreateRealm(graph, sessionName);
SpreadsheetBook book = realm.getEngine();
SpreadsheetCell sc = book.get(sheet.getName(graph), r.startRow, r.startColumn);
StandardRealm<SheetNode, SpreadsheetBook> realm = SpreadsheetSessionManager.getInstance().getOrCreateRealm(graph, sessionName);
SpreadsheetBook book = realm.getEngine();
SpreadsheetCell sc = book.get(sheet.getName(graph), r.startRow, r.startColumn);