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+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2013 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Empty name space for the Blocks singleton.
+ * @author spertus@google.com (Ellen Spertus)
+ */
+'use strict';
+
+goog.provide('Blockly.Blocks');
+
+/**
+ * Allow for switching between one and zero based indexing for lists and text,
+ * one based by default.
+ */
+Blockly.Blocks.ONE_BASED_INDEXING = true;