I am trying to retrieve datum identifier information from the geometric tolerances defined in a 3D model.
I have tried the following APIs, but none of them were able to retrieve the datum information.

IGtol::GetDatumIdentifier()

IPMIFrameData::GetGtolDatumAtIndex()

IDimXpertTolerance::GetPrimaryDatums()

If there are any other APIs that can retrieve datum information, please let me know.