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diff --git a/src/runtime/CL/mlgo/Utils.h b/src/runtime/CL/mlgo/Utils.h
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+/*
+ * Copyright (c) 2021 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef SRC_RUNTIME_CL_MLGO_UTILS_H
+#define SRC_RUNTIME_CL_MLGO_UTILS_H
+
+#include "src/runtime/CL/mlgo/Common.h"
+#include "src/runtime/CL/mlgo/HeuristicTree.h"
+#include "src/runtime/CL/mlgo/MLGOHeuristics.h"
+#include "src/runtime/CL/mlgo/MLGOParser.h"
+
+#include <ostream>
+#include <string>
+
+namespace arm_compute
+{
+namespace mlgo
+{
+std::ostream &operator<<(std::ostream &os, const GEMMConfigNative &config);
+std::ostream &operator<<(std::ostream &os, const GEMMConfigReshapedOnlyRHS &config);
+std::ostream &operator<<(std::ostream &os, const GEMMConfigReshaped &config);
+std::ostream &operator<<(std::ostream &os, HeuristicType ht);
+std::ostream &operator<<(std::ostream &os, DataType dt);
+std::ostream &operator<<(std::ostream &os, const HeuristicTree::Index &index);
+std::ostream &operator<<(std::ostream &os, const Query &query);
+std::string   to_string(const GEMMConfigNative &config);
+std::string   to_string(const GEMMConfigReshapedOnlyRHS &config);
+std::string   to_string(const GEMMConfigReshaped &config);
+std::string   to_string(const Query &query);
+namespace parser
+{
+std::ostream &operator<<(std::ostream &os, const CharPosition &pos);
+} // namespace parser
+} // namespace mlgo
+} // namespace arm_compute
+
+#endif //SRC_RUNTIME_CL_MLGO_UTILS_H