Function findByValue

findByValue<T>(
    root: TraversableTree<T>,
    predicate: (nodeValue: T) => boolean,
    order?: "depth" | "breadth",
): undefined | TraversableTree<T>
Applies predicate to root and all its child nodes, returning the node value for predicate yields true. Use find to filter by nodes rather than values
```
const n = findByValue(root, (v) => v.name === 'Bob');
```
Type Parameters
- T
Parameters
- root: TraversableTree<T>
- predicate: (nodeValue: T) => boolean
- order: "depth" | "breadth" = ...
  Iterate children by breadth or depth. Default 'breadth'
Returns undefined | TraversableTree<T>