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diff --git a/tools/aapt2/ProguardRules.h b/tools/aapt2/ProguardRules.h
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+++ b/tools/aapt2/ProguardRules.h
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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 AAPT_PROGUARD_RULES_H
+#define AAPT_PROGUARD_RULES_H
+
+#include "Resource.h"
+#include "Source.h"
+#include "XmlDom.h"
+
+#include <map>
+#include <ostream>
+#include <set>
+#include <string>
+
+namespace aapt {
+namespace proguard {
+
+class KeepSet {
+public:
+    inline void addClass(const SourceLine& source, const std::u16string& className) {
+        mKeepSet[className].insert(source);
+    }
+
+    inline void addMethod(const SourceLine& source, const std::u16string& methodName) {
+        mKeepMethodSet[methodName].insert(source);
+    }
+
+private:
+    friend bool writeKeepSet(std::ostream* out, const KeepSet& keepSet);
+
+    std::map<std::u16string, std::set<SourceLine>> mKeepSet;
+    std::map<std::u16string, std::set<SourceLine>> mKeepMethodSet;
+};
+
+bool collectProguardRulesForManifest(const Source& source, xml::Node* node, KeepSet* keepSet);
+bool collectProguardRules(ResourceType type, const Source& source, xml::Node* node,
+                          KeepSet* keepSet);
+
+bool writeKeepSet(std::ostream* out, const KeepSet& keepSet);
+
+} // namespace proguard
+} // namespace aapt
+
+#endif // AAPT_PROGUARD_RULES_H