1 files changed, 3 insertions, 0 deletions
diff --git a/src/model/core.js b/src/model/core.js
index c750ff53..cb5dca59 100644
--- a/src/model/core.js
+++ b/src/model/core.js
@@ -39,6 +39,9 @@ define(['util'], function(util) {
 
     function Node() {
     }
+    Node.prototype.equals = function(other_node){
+        return this.id == other_node.id;
+    }
 
     function Link() {
     }