diff -r 4ebc2e2fb97c -r 71c04702a3d5 make/jdk/src/classes/build/tools/generatenimbus/Canvas.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/jdk/src/classes/build/tools/generatenimbus/Canvas.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package build.tools.generatenimbus;
+
+import java.util.List;
+
+import javax.xml.bind.annotation.XmlElement;
+
+class Canvas {
+    @XmlElement private Dimension size;
+    public Dimension getSize() { return size; }
+
+    @XmlElement(name="layer") private List<Layer> layers;
+    public List<Layer> getLayers() { return layers; }
+
+    @XmlElement private Insets stretchingInsets = null;
+    public Insets getStretchingInsets() { return stretchingInsets; }
+
+    public boolean isBlank() {
+        return layers.size() == 0 || (layers.size() == 1 && layers.get(0).isEmpty());
+    }
+}