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diff --git a/GudhUI/utils/UI_utils.h b/GudhUI/utils/UI_utils.h
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+++ b/GudhUI/utils/UI_utils.h
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+/* This file is part of the Gudhi Library. The Gudhi library 
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++ 
+ *    library for computational topology.
+ *
+ *    Author(s):       David Salinas
+ *
+ *    Copyright (C) 2014  INRIA Sophia Antipolis-Mediterranee (France)
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program 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 General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+#ifndef UTILS_UI_UTILS_H_
+#define UTILS_UI_UTILS_H_
+
+#define UIDBG_VERBOSE
+
+#ifdef UIDBG_VERBOSE
+#define UIDBG(a) std::cerr << "UIDBG: " << (a) << std::endl
+#define UIDBGMSG(a, b) std::cerr << "UIDBG: " << a << b << std::endl
+#define UIDBGVALUE(a) std::cerr << "UIDBG: " <<  #a << ": " << a << std::endl
+#define UIDBGCONT(a) std::cerr << "UIDBG: container " << #a << " -> "; for (auto x : a) std::cerr << x << ","; std::cerr << std::endl }
+#else
+// #define DBG(a) a
+// #define DBGMSG(a, b) b
+// #define DBGVALUE(a) a
+// #define DBGCONT(a) a
+#define UIDBG(a)
+#define UIDBGMSG(a, b)
+#define UIDBGVALUE(a)
+#define UIDBGCONT(a)
+#endif
+
+#endif  // UTILS_UI_UTILS_H_