Orphaning and deleting canvas graphics
Figure 34 shows the functions for orphaning and adopting canvas graphics. Clients of MCanvasRepresentation can orphan graphics from the representation or can delete one or all canvas graphics from the representation. The Delete and DeleteAll functions cause the representation to delete the associated storage on behalf of the client. The Orphan function returns the canvas graphic to the client, and the client is then responsible for managing the storage.
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