Add List.insert.

sdk/lib/_collection_dev/list.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart._collection.dev;
 
 /**
  * Class implementing the read-operations on [List].
  *
  * Implements all read-only operations, except [:operator[]:] and [:length:],
@@ skipping 72 matching lines @@
   void add(E value) {
     throw new UnsupportedError(
         "Cannot add to a fixed-length list");
   }
 
   void addLast(E value) {
     throw new UnsupportedError(
         "Cannot add to a fixed-length list");
   }
 
+  void insert(int index, E value) {
+    throw new UnsupportedError(
+        "Cannot add to a fixed-length list");
+  }
+
   void addAll(Iterable<E> iterable) {
     throw new UnsupportedError(
         "Cannot add to a fixed-length list");
   }
 
   void remove(E element) {
     throw new UnsupportedError(
         "Cannot remove from a fixed-length list");
   }
 
@@ skipping 61 matching lines @@
   void add(E value) {
     throw new UnsupportedError(
         "Cannot add to an unmodifiable list");
   }
 
   void addLast(E value) {
     throw new UnsupportedError(
         "Cannot add to an unmodifiable list");
   }
 
+  E insert(int index, E value) {
+    throw new UnsupportedError(
+        "Cannot add to an unmodifiable list");
+  }
+
   void addAll(Iterable<E> iterable) {
     throw new UnsupportedError(
         "Cannot add to an unmodifiable list");
   }
 
   void remove(E element) {
     throw new UnsupportedError(
         "Cannot remove from an unmodifiable list");
   }
 
@@ skipping 132 matching lines @@
   }
 
   E remove(int key) {
     throw new UnsupportedError("Cannot modify an unmodifiable map");
   }
 
   void clear() {
     throw new UnsupportedError("Cannot modify an unmodifiable map");
   }
 }