list.updateDeep(newProps)

Recursively updates the properties on the list with newProps. Properties not in newProps will be set to undefined.

var list = new DefineList(["A","B"]);
list.assign({count: 0, skip: 2, foo: {bar: 'zed', a: 'b'}});
list.updateDeep({foo: {bar: 'yay'}});

list.get("count") //-> undefined
list.get("skip") //-> undefined
list.get("foo") // -> {bar: 'yay', a: undefined}