diff -r e8e8391f7a1a -r 7c63eefd620a src/jdk.internal.vm.compiler/share/classes/org.graalvm.options/src/org/graalvm/options/OptionDescriptors.java
--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.options/src/org/graalvm/options/OptionDescriptors.java	Fri Feb 02 17:02:45 2018 +0530
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,186 +0,0 @@
-/*
- * Copyright (c) 2017, 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 org.graalvm.options;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.NoSuchElementException;
-
-/**
- * An interface to a set of {@link OptionDescriptor}s.
- *
- * @since 1.0
- */
-public interface OptionDescriptors extends Iterable<OptionDescriptor> {
-
-    /**
-     * An empty set of option descriptors.
-     *
-     * @since 1.0
-     */
-    OptionDescriptors EMPTY = new OptionDescriptors() {
-
-        public Iterator<OptionDescriptor> iterator() {
-            return Collections.<OptionDescriptor> emptyList().iterator();
-        }
-
-        public OptionDescriptor get(String key) {
-            return null;
-        }
-    };
-
-    /**
-     * Gets the {@link OptionDescriptor} matching a given option name or {@code null} if this option
-     * descriptor set does not contain a matching option name.
-     *
-     * @since 1.0
-     */
-    OptionDescriptor get(String optionName);
-
-    /**
-     * Creates a union options descriptor out of multiple given descriptors. The operation
-     * descriptors are not checked for duplicate keys. The option descriptors are iterated in
-     * declaration order.
-     *
-     * @since 1.0
-     */
-    static OptionDescriptors createUnion(OptionDescriptors... descriptors) {
-        if (descriptors.length == 0) {
-            return EMPTY;
-        } else if (descriptors.length == 1) {
-            return descriptors[0];
-        } else {
-            return new UnionOptionDescriptors(descriptors);
-        }
-    }
-
-    /**
-     * {@inheritDoc}
-     *
-     * @since 1.0
-     */
-    @Override
-    Iterator<OptionDescriptor> iterator();
-
-    /**
-     * Creates an {@link OptionDescriptors} instance from a list. The option descriptors
-     * implementation is backed by a {@link LinkedHashMap} that preserves ordering.
-     *
-     * @since 1.0
-     */
-    static OptionDescriptors create(List<OptionDescriptor> descriptors) {
-        if (descriptors == null || descriptors.isEmpty()) {
-            return EMPTY;
-        }
-        return new OptionDescriptorsMap(descriptors);
-    }
-}
-
-class OptionDescriptorsMap implements OptionDescriptors {
-
-    final Map<String, OptionDescriptor> descriptors = new LinkedHashMap<>();
-
-    OptionDescriptorsMap(List<OptionDescriptor> descriptorList) {
-        for (OptionDescriptor descriptor : descriptorList) {
-            descriptors.put(descriptor.getName(), descriptor);
-        }
-    }
-
-    @Override
-    public OptionDescriptor get(String optionName) {
-        return descriptors.get(optionName);
-    }
-
-    @Override
-    public Iterator<OptionDescriptor> iterator() {
-        return descriptors.values().iterator();
-    }
-
-}
-
-final class UnionOptionDescriptors implements OptionDescriptors {
-
-    final OptionDescriptors[] descriptorsList;
-
-    UnionOptionDescriptors(OptionDescriptors[] descriptors) {
-        // defensive copy
-        this.descriptorsList = Arrays.copyOf(descriptors, descriptors.length);
-    }
-
-    public Iterator<OptionDescriptor> iterator() {
-        return new Iterator<OptionDescriptor>() {
-
-            Iterator<OptionDescriptor> descriptors = descriptorsList[0].iterator();
-            int descriptorsIndex = 0;
-            OptionDescriptor next = null;
-
-            public boolean hasNext() {
-                return fetchNext() != null;
-            }
-
-            private OptionDescriptor fetchNext() {
-                if (next != null) {
-                    return next;
-                }
-                if (descriptors.hasNext()) {
-                    next = descriptors.next();
-                    return next;
-                } else if (descriptorsIndex < descriptorsList.length - 1) {
-                    descriptorsIndex++;
-                    descriptors = descriptorsList[descriptorsIndex].iterator();
-                    return fetchNext();
-                } else {
-                    return null;
-                }
-            }
-
-            public OptionDescriptor next() {
-                OptionDescriptor fetchedNext = fetchNext();
-                if (fetchedNext != null) {
-                    // consume next
-                    this.next = null;
-                    return fetchedNext;
-                } else {
-                    throw new NoSuchElementException();
-                }
-            }
-        };
-    }
-
-    public OptionDescriptor get(String value) {
-        for (OptionDescriptors descriptors : descriptorsList) {
-            OptionDescriptor descriptor = descriptors.get(value);
-            if (descriptor != null) {
-                return descriptor;
-            }
-        }
-        return null;
-    }
-
-}