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diff --git a/runtimes/neurun/src/graph/operation/Set.h b/runtimes/neurun/src/graph/operation/Set.h
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+++ b/runtimes/neurun/src/graph/operation/Set.h
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+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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.
+ */
+
+#ifndef __NEURUN_GRAPH_OPERATION_SET_H__
+#define __NEURUN_GRAPH_OPERATION_SET_H__
+
+#include <memory>
+
+#include "graph/operation/Index.h"
+#include "Node.h"
+
+#include <unordered_map>
+
+namespace neurun
+{
+namespace graph
+{
+namespace operation
+{
+
+class Set
+{
+public:
+  Set() : _index_count(0) {}
+
+public:
+  Index append(std::unique_ptr<Node> &&node);
+
+public:
+  const Node &at(const Index &) const;
+  Node &at(const Index &);
+  bool exist(const Index &) const;
+  uint32_t size() const { return _nodes.size(); }
+  void iterate(const std::function<void(const Index &, const Node &)> &fn) const;
+  void iterate(const std::function<void(const Index &, Node &)> &fn);
+
+private:
+  const Index generateIndex();
+
+private:
+  std::unordered_map<Index, std::unique_ptr<Node>> _nodes;
+  uint32_t _index_count;
+};
+
+} // namespace operation
+} // namespace graph
+} // namespace neurun
+
+#endif // __NEURUN_GRAPH_OPERATION_SET_H__