add container() method that retrieves the main container

select2.js

@@ -1424,7 +1424,7 @@
         var args = Array.prototype.slice.call(arguments, 0),
             opts,
             select2,
-            value, multiple, allowedMethods = ["val", "destroy", "open", "close", "focus", "isFocused"];
+            value, multiple, allowedMethods = ["val", "destroy", "open", "close", "focus", "isFocused", "container"];
 
         this.each(function () {
             if (args.length === 0 || typeof(args[0]) === "object") {
@@ -1449,7 +1449,11 @@
                 value = undefined;
                 select2 = $(this).data("select2");
                 if (select2 === undefined) return;
-                value = select2[args[0]].apply(select2, args.slice(1));
+                if (args[0] === "container") {
+                    value=select2.container;
+                } else {
+                    value = select2[args[0]].apply(select2, args.slice(1));
+                }
                 if (value !== undefined) {return false;}
             } else {
                 throw "Invalid arguments to select2 plugin: " + args;