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+/* -*- Mode: Vala; indent-tabs-mode: nil; tab-width: 4 -*-
+ *
+ * Copyright (C) 2011,2012 Canonical Ltd
+ * Copyright (C) 2015-2017 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
+ * Copyright (C) 2022 Mihai Moldovan <ionic@ionic.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * 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/>.
+ *
+ * Authors: Robert Ancell <robert.ancell@canonical.com>
+ * Michael Terry <michael.terry@canonical.com>
+ * Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
+ * Mihai Moldovan <ionic@ionic.de>
+ */
+
+#if !HAVE_GTK_4_0
+[CCode(cname = "GTK_IS_CONTAINER", cheader_filename="gtk/gtk.h", simple_generics = true, has_target = false)]
+static extern bool gtk_is_container<T> (T widget);
+#endif