uschindler commented on a change in pull request #177:
URL: https://github.com/apache/lucene/pull/177#discussion_r648181777



##########
File path: lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
##########
@@ -16,28 +16,17 @@
  */
 package org.apache.lucene.store;
 
-import static java.lang.invoke.MethodHandles.*;
-import static java.lang.invoke.MethodType.methodType;
-
 import java.io.IOException;
-import java.lang.invoke.MethodHandle;
-import java.lang.reflect.Field;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.MappedByteBuffer;
 import java.nio.channels.ClosedChannelException; // javadoc @link
-import java.nio.channels.FileChannel;
 import java.nio.channels.FileChannel.MapMode;
+import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.StandardOpenOption;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
 import java.util.Locale;
-import java.util.Objects;
 import java.util.concurrent.Future;
-import org.apache.lucene.store.ByteBufferGuard.BufferCleaner;
+import jdk.incubator.foreign.MemorySegment;
+import jdk.incubator.foreign.ResourceScope;
 import org.apache.lucene.util.Constants;
-import org.apache.lucene.util.SuppressForbidden;
+import org.apache.lucene.util.Unwrapable;

Review comment:
       Sorry for not responding here. @dweiss talked about that already in the 
JDK-16 pull request (#173). It's a hack here, we can rename. I'd like to add 
those changes into Lucene before this PR is merged, so we can discuss this on a 
separate issue.




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