code: public WorkbookWriter turnToSheet(@NonNull String name) {
      checkArgument(getAllSheetNames().contains(name), SHEET_NOT_FOUND);
      return turnToSheet(getAllSheetNames().indexOf(name));
    }
docs: Creates a new sheet and turns this {@link WorkbookWriter} to the sheet.
  
  @param name
  of a sheet
  @return this {@link WorkbookWriter}