Add or update collection based on class property.

Hi,

I have got a Collection filled with all different entries of a class (clsOG).
I would like to check if a certain class property (g.name) is already present in the collection. If so i only want to update the class, if not add the class to the collection.

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With the code shown above, all entries are added to the collection, I want to end up only with the collection of discticnt 'g.names' with the correct counts.

Can anyone point me in the right direction?

TIA

ABBOV.