Finds an overlay which contains the given dataset.
The position in the list of overlays from which to calculate the search start (see bForwards, below). If set to -1 then the entire list is searched in the order specified by bForwards.
Search from pos% + 1 (or the start if pos% is -1) to the end of the list of overlays.
Search from pos% - 1 (or the end if pos% is -1) to the beginning of the list of overlays.
The position in the list of overlays of an overlay which contains the dataset, or -1 if the dataset is not found.
Available: GEO D OD OM SISpy
sis.FindDatasetOverlay (4, –1, True)