Function hasChild

hasChild<T extends TraversableTree<TV> | TreeNode<TV>, TV>(
    parent: T,
    possibleChild: T,
    eq?: IsEqual<T>,
    maxDepth?: number,
): boolean
Returns true if possibleChild is contained within maxDepth children of parent node. By default only looks at immediate children (maxDepth = 0).
```
// Just check parentNode for childNode
Trees.hasChild(parentNode, childNode);
// See if parentNode or parentNode's parents have childNode
Trees.hasChild(parentNode, childNode, 1);
// Use custom equality function, in this case comparing on name field
Trees.hasChild(parentNode, childNode, 0, (a, b) => a.name === b.name);
```
Type Parameters
- TextendsTraversableTree<TV> | TreeNode<TV>
- TV
Parameters
- parent: T
  Parent tree
- possibleChild: T
  Sought child
- eq: IsEqual<T> = isEqualDefault
  Equality function, or isEqualDefault if undefined.
- maxDepth: number = 0
  Maximum depth. 0 for immediate children, Number.MAX_SAFE_INTEGER for boundless
Returns boolean