Gets the depth of a #GNode.
If @node is %NULL the depth is 0. The root node has a depth of 1. For the children of the root node the depth is 2. And so on.
Return: the depth of the #GNode
See Implementation
Gets the depth of a #GNode.
If @node is %NULL the depth is 0. The root node has a depth of 1. For the children of the root node the depth is 2. And so on.
Return: the depth of the #GNode