The saveSheetData operation will save the new sheet data to the sheet you are working with. This is useful either after running a sheet collection via the API or setting specific cell values via the API.
// Initialize SheetSearch
var sheet = new x_vivid_sheets.SheetSearch('a6b4ff401bac8a100dfx74cf034bcb3d');
// Collect most recent data for the sheet
sheet.collectSheetData();
// Save the newly collected data to the Sheet
sheet.saveSheetData();
After the new sheet data is saved, the next time a user goes to the sheet through the VividSheets interface, they will see the new data.