From d96905437ea043766135ee4c5cd4d32366547288 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 23 Apr 2019 22:12:31 +0200
Subject: [PATCH] Add Node.IsLeaf

---
 node.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/node.go b/node.go
index 3b6c1f3..04e6050 100644
--- a/node.go
+++ b/node.go
@@ -239,6 +239,11 @@ func (n *Node) IsContainer() bool {
 	}
 }
 
+// IsLeaf returns true if 'n' is a leaf node.
+func (n *Node) IsLeaf() bool {
+	return !n.IsContainer()
+}
+
 func (n *Node) canContain(t NodeType) bool {
 	if n.Type == List {
 		return t == Item