Results for grouped options (see select2#4662)

Author: alexweissman

docs/_includes/options/data/ajax.html

@@ -32,18 +32,59 @@ <h3>
 {
   "results": [
     {
-      "id": "1",
+      "id": 1,
       "text": "Option 1"
     },
     {
-      "id": "2",
+      "id": 2,
       "text": "Option 2"
     }
   ],
   "pagination": {
     "more": true
   }
 }
+{% endhighlight %}
+
+  <h4>Results for grouped options</h4>
+
+<p>
+    When options are to be generated in <code>&lt;optgroup&gt;</code> sections, options should be nested under the <code>children</code> attribute of each group object:
+ 
+{% highlight json linenos %}
+{
+  "results": [
+    { 
+      "text": "Group 1", 
+      "children" : [
+        {
+            "id": 1,
+            "text": "Option 1.1"
+        }
+        {
+            "id": 2,
+            "text": "Option 1.2"
+        }
+      ]
+    },
+    { 
+      "text": "Group 2", 
+      "children" : [
+        {
+            "id": 3,
+            "text": "Option 2.1"
+        }
+        {
+            "id": 4,
+            "text": "Option 2.2"
+        }
+      ]
+    }
+  ],
+  "paginate": {
+    "more": true
+  }
+}
 {% endhighlight %}
 
   <h3>