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Context: I have the heapwalker open, I have selected a class and performed "show in instances view". Use case: I am looking through all the referents of the class, I am generally only interested in seeing a given reference once. Even if it is in the object graph multiple times, I don't want to waste time examining it multiple times. Possible solution: provide a checkbox called "remove duplicates". Whenever a node is in the tree more than once, only display it's children the first time is appears. For every time after that, change the node's icon to something different to indicate that it is a duplicate, and do not display it's children.