package net.openhft.chronicle.map;

import net.openhft.chronicle.core.io.Closeable;

public interface MapClosable extends Closeable {

    @Override
    default boolean isClosed() {
        throw new UnsupportedOperationException();
    }
}

@@ -187,49 +187,68 @@
     
-throw new UnsupportedOperationException()
+// if we don't know, pretend it is not.%0A        return false
 ;%0A  

Add `throwExceptionIfClosed();` to most public methods for classes implementing Closeable, https://github.com/OpenHFT/Chronicle-Core/issues/116