Method rotateRight

src/test/resources/pta/basic/RedBlackBST.java:184–193

(Node h)

    }

    private Node rotateRight(Node h) {
        Node x = h.left;
        h.left = x.right;
        x.right = h;
        x.color = x.right.color;
        x.right.color = RED;
        x.size = h.size;
        h.size = size(h.left) + size(h.right) + 1;
        return x;
    }

    private Node rotateLeft(Node h) {
        Node x = h.right;