qsort()-style comparison function.
data to pass to comparison function.
a function to free the memory allocated for the key used when removing the entry from the GTree or NULL if you don't want to supply such a function.
a function to free the memory allocated for the value used when removing the entry from the GTree or NULL if you don't want to supply such a function.
ConstructionException GTK+ fails to create the object.
Creates a new GTree like g_tree_new() and allows to specify functions to free the memory allocated for the key and value that get called when removing the entry from the GTree.