Sets the model for a GtkEntryCompletion.
If @completion already has a model set, it will remove it before setting the new model. If model is %NULL, then it will unset the model.
the GtkTreeModel
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Sets the model for a GtkEntryCompletion.
If @completion already has a model set, it will remove it before setting the new model. If model is %NULL, then it will unset the model.