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diff --git a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/metadata.hpp b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/metadata.hpp
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+/*
+    Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_METADATA_HPP_INCLUDED__
+#define __ZMQ_METADATA_HPP_INCLUDED__
+
+#include <map>
+#include <string>
+
+#include "atomic_counter.hpp"
+
+namespace zmq
+{
+    class metadata_t
+    {
+        public:
+
+            typedef std::map <std::string, const std::string> dict_t;
+
+            metadata_t (const dict_t &dict);
+            virtual ~metadata_t ();
+
+            //  Returns pointer to property value or NULL if
+            //  property is not found.
+            virtual const char *get (const std::string &property) const;
+
+            virtual void add_ref ();
+
+            //  Drop reference. Returns true iff the reference
+            //  counter drops to zero.
+            virtual bool drop_ref ();
+
+        private:
+
+            //  Reference counter.
+            atomic_counter_t ref_cnt;
+
+            //  Dictionary holding metadata.
+            const dict_t dict;
+    };
+
+}
+
+#endif