Get this node's *named* child at the given index.
See also [Node::is_named]. This method is fairly fast, but its cost is technically log(i), so you if you might be iterating over a long list of children, you should use [Node::named_children] instead.
A Nulllable!Node
See Implementation
Get this node's *named* child at the given index.
See also [Node::is_named]. This method is fairly fast, but its cost is technically log(i), so you if you might be iterating over a long list of children, you should use [Node::named_children] instead.