get the type/class of a property from its name in swift

Lets say I have this class:

class Node {
var value: String
var children: Array<Node>? = nil
}

If I have the name of one of its properties (for example "children") how can I get its type? (In this case case Array<String>?)

I imagine having a global function like below will solve my needs

func typeOfPropertyWithName(name: String, ofClass:AnyClass) -> AnyClass? {
    ???
}
// Example usage:
var arrayOfNodesClass = typeOfPropertyWithName("children", Node.self)