Looks like the `this.columnNames` [array](https://github.com/vlucas/sheetquery/blob/main/dist/index.js#L16C10-L16C21) is not taken into account to return only the selected column names (it is not used at all in the code).
Looks like the
this.columnNamesarray is not taken into account to return only the selected column names (it is not used at all in the code).