From 1de26d3c5d8daf4ab6d8a08cd0dd7155e1806d66 Mon Sep 17 00:00:00 2001
From: Victor Woeltjen <victor.woeltjen@nasa.gov>
Date: Fri, 12 Aug 2016 09:30:02 -0700
Subject: [PATCH] [API] Throw error on containment violation

---
 src/api/composition/CompositionCollection.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/api/composition/CompositionCollection.js b/src/api/composition/CompositionCollection.js
index 3d988036ac..591085a629 100644
--- a/src/api/composition/CompositionCollection.js
+++ b/src/api/composition/CompositionCollection.js
@@ -52,6 +52,9 @@ define([
         if (!this._children) {
             throw new Error("Must load composition before you can add!");
         }
+        if (!this.canContain(child)) {
+            throw new Error("This object cannot contain that object.");
+        }
         if (this.contains(child)) {
             if (skipMutate) {
                 return; // don't add twice, don't error.