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diff --git a/runtimes/neurun/core/include/model/Subgraphs.h b/runtimes/neurun/core/include/model/Subgraphs.h
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+/*
+ * Copyright (c) 2019 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_MODEL_SUBGRAPHS_H__
+#define __NEURUN_MODEL_SUBGRAPHS_H__
+
+#include "model/Index.h"
+#include "model/Subgraph.h"
+#include "util/ObjectManager.h"
+
+namespace neurun
+{
+namespace model
+{
+
+/**
+ * @brief Class that manages Subgraph objects
+ */
+class Subgraphs : public util::ObjectManager<SubgraphIndex, Subgraph>
+{
+public:
+  /**
+   * @brief Create an instance of Subgraph with given op and push it to objects
+   *
+   * @param[in] op_idx Operation index that is emplaced
+   * @param[in] op Operation that is emplaced
+   * @param[in] layout Subgraph's layout
+   * @return SubgraphIndex
+   */
+  SubgraphIndex emplace(const OperationIndex &op_index, const Operation &op, Layout layout);
+
+  /**
+   * @brief Push an instance of Subgraph to objects
+   *
+   * @param[in] subg An instance of Subgraph
+   * @return SubgraphIndex
+   */
+  SubgraphIndex emplace(std::unique_ptr<Subgraph> &&subg);
+
+  /**
+   * @brief Check if an operation does exist in any subgraphs
+   *
+   * @param operation_index Operation index to find
+   * @return true If such operation exists in any subgraphs otherwise false
+   */
+  bool containsOperation(const OperationIndex &operation_index) const;
+  /**
+   * @brief Find an operation from all subgraphs
+   *
+   * @param operation_index Operation index to find
+   * @return SubgraphIndex Index of Subgraph that contains given operation index
+   */
+  SubgraphIndex getOperation(const OperationIndex &operation_index) const;
+  /**
+   * @brief Dump subgraphs
+   *
+   * @param msg Message that will be displayed
+   */
+  void dump(const std::string &msg) const;
+
+private:
+  SubgraphIndex findOperation(const OperationIndex &operation_index) const;
+};
+
+} // namespace model
+} // namespace neurun
+
+#endif // __NEURUN_MODEL_SUBGRAPHS_H__