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diff --git a/source/blender/depsgraph/intern/eval/deg_eval.h b/source/blender/depsgraph/intern/eval/deg_eval.h
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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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 2
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2013 Blender Foundation.
+ * All rights reserved.
+ *
+ * Original Author: Joshua Leung
+ * Contributor(s): None Yet
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/depsgraph/intern/eval/deg_eval.cc
+ *  \ingroup depsgraph
+ *
+ * Evaluation engine entrypoints for Depsgraph Engine.
+ */
+
+#pragma once
+
+struct EvaluationContext;
+
+namespace DEG {
+
+struct Depsgraph;
+
+/**
+ * Evaluate all nodes tagged for updating,
+ * \warning This is usually done as part of main loop, but may also be
+ * called from frame-change update.
+ *
+ * \note Time sources should be all valid!
+ */
+void deg_evaluate_on_refresh(EvaluationContext *eval_ctx,
+                             Depsgraph *graph,
+                             const int layers);
+
+}  // namespace DEG