traverse
Traverses a tree starting at the given root #GNode. It calls the given function for each node visited. The traversal can be halted at any point by returning true from @func.
Parameters
order
the order in which nodes are visited - %G_IN_ORDER, %G_PRE_ORDER, %G_POST_ORDER, or %G_LEVEL_ORDER.
flags
which types of children are to be visited, one of %G_TRAVERSE_ALL, %G_TRAVERSE_LEAVES and %G_TRAVERSE_NON_LEAVES
maxDepth
the maximum depth of the traversal. Nodes below this depth will not be visited. If max_depth is -1 all nodes in the tree are visited. If depth is 1, only the root is visited. If depth is 2, the root and its children are visited. And so on.
func
the function to call for each visited #GNode