/**
* Return the CTCol at the given (0 based) column index,
* creating it if required.
*/
protected CTCol getOrCreateColumn1Based(long index1, boolean splitColumns) {
CTCol col = getColumn1Based(index1, splitColumns);
if (col == null) {
col = worksheet.getColsArray(0).addNewCol();
col.setMin(index1);
col.setMax(index1);
}
return col;
}