Purge ALL datatable entries within a time range

How do I purge any and all entries for a given datatable that are within a certain time range? I don't care what values may be contained within the time range - I will want to delete them, regardless. 

I've tried these two out-of-the-box methods from PTC:

Things["MyDataTable"].PurgePropertyHistory({
propertyName: undefined,
endDate: myEndTimeStamp,
immediate: true,
startDate: myStartTimeStamp
});

...and......

Things["Ford.PFS.GM.Historian.Repository"].PurgeSelectedPropertyHistory({
propertiesToPurge: eventFramesInfoTable /* I passed an empty infotable here that was the same shape as my data table */,
endDate:myEndTimeStamp,
startDate:myStartTimeStamp
});