--- /dev/null	2019-03-05 14:31:11.000000000 +0300
+++ new/src/java.desktop/macosx/classes/sun/java2d/metal/MTLGraphicsConfigBase.java	2019-03-05 14:31:11.000000000 +0300
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2019, 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 sun.java2d.metal;
+
+import sun.awt.image.SurfaceManager;
+import sun.java2d.SurfaceData;
+import sun.java2d.pipe.hw.AccelGraphicsConfig;
+
+/**
+ * This interface collects the methods that are provided by both
+ * GLXGraphicsConfig and WGLGraphicsConfig, making it easier to invoke these
+ * methods directly from MTLSurfaceDataBase.
+ */
+public interface MTLGraphicsConfigBase extends
+    AccelGraphicsConfig, SurfaceManager.ProxiedGraphicsConfig
+{
+    MTLContext getContext();
+    long getNativeConfigInfo();
+    boolean isCapPresent(int cap);
+    SurfaceData createManagedSurface(int w, int h, int transparency);
+}