in src/main/java/com/twitter/nodes/Node.java [1068:1077]
public static <T, A, B, C> Node<T> flatMap3(
String name,
Node<A> aNode, Node<B> bNode, Node<C> cNode, Function3<Future<T>, A, B, C> func) {
return new Node<T>(name, aNode, bNode, cNode) {
@Override
protected Future<T> evaluate() throws Exception {
return func.apply(aNode.emit(), bNode.emit(), cNode.emit());
}
};
}