Traverses all nodes of this according to the parameters.
For each node matching the traversal parameters, func will be executed.
Only g_pre_order and g_post_order are supported for order
.
If max_depth is less than zero, the entire tree will be traversed. If max_depth is 1, then only the root will be traversed.
| this |
A Trie. |
| key |
The key to start traversal from. |
| order |
The order to traverse. |
| flags |
The flags for which nodes to callback. |
| max_depth |
the maximum depth to process. |
| func |
The func to execute for each matching node. |
| user_data |
User data for |