return config;
}
protected void expandChildren(){
if(children == null){
Expander expander = new Expander(gameState, config.getModel(), gameState.getNextToAct(), bot, config.getSampler());
List<ProbabilityAction> actions = expander.getProbabilityActions();
ImmutableList.Builder<INode> childrenBuilder = ImmutableList.builder();
probabilities = new double[actions.size()];
cumulativeProbability = new double[actions.size()];
double cumul = 0;
for (int i=0;i<actions.size();i++) {