stepOut
fun stepOut(status: BranchSeeker.Status, message: String, storedData: Map<NodeParameterKey<*, *>, Any?>)
Steps out of the current node.
The current node is updated with the given status, message and stored data. The current node is set to the parent of this node.
If the current node does not have a parent, i.e. the current node is the root node, an exception is thrown.