gtk:tree-model-unref-node (model iter)

model -- a gtk:tree-model object
iter -- a gtk:tree-iter instance

Lets the tree unref the node. This is an optional method for models to implement. To be more specific, models may ignore this call as it exists primarily for performance reasons. For more information on what this means, see the gtk:tree-model-ref-node function.

Please note that nodes that are deleted are not unreffed.