all nodes should be visited.
identical to %G_TRAVERSE_LEAVES.
only leaf nodes should be visited. This name has been introduced in 2.6, for older version use %G_TRAVERSE_LEAFS.
a mask of all traverse flags.
identical to %G_TRAVERSE_NON_LEAVES.
only non-leaf nodes should be visited. This name has been introduced in 2.6, for older version use %G_TRAVERSE_NON_LEAFS.
Specifies which nodes are visited during several of the tree functions, including g_node_traverse() and g_node_find().