I have this code snippet:

```
function getTimeFrames(){
  var ss = SpreadsheetApp.getActive();
  var cell = ss.getRange("C1").getValue();
  Logger.log(cell);

  var s = ss.getSheetByName(cell).getRange("M2:M");
  var unique = new Set(s.getValues());

  unique.forEach(x => Logger.log(x))
}

```

This code would be called from a Google Sheets spreadsheet which serves as an UI, where the C1 cell would be a name of a sheet used for storing data. In that sheet I have a column (M) that I need to get the unique values out of in order to store in a drop-down in the UI sheet.

The problem I have is that I can't get the unique values part working at all. Throughout my experimentation, I would either get a list of all the values of column M or no Logging output at all.

Any help is greatly appreciated!