/**
* Provides a show instance that draws a 2-dimensional representation of a tree.
*
* @param s A show instance for the elements of the tree.
* @return a show instance that draws a 2-dimensional representation of a tree.
*/
public static <A> Show<Tree<A>> show2D(final Show<A> s) {
return Show.showS(tree -> tree.draw(s));
}
private Stream<String> drawTree(final Show<A> s) {
return drawSubTrees(s, subForest._1()).cons(s.showS(root));
}