public boolean isDirectory() { return fileInfo.isDirectory(); }
            // ... other attribute methods
        });
        
        return file;
    }
}
```

### 4.4 Directory Change Notifier
```java
package jcifs.internal.smb2.lease;

import jcifs.internal.smb2.ServerMessageBlock2;
import java.util.concurrent.ConcurrentHashMap;

public class DirectoryChangeNotifier {

    }
    
    public RdmaProvider getProvider() {
        return provider;
    }
    
    public RdmaConnection getConnection() {
        return rdmaConnection;
    }
}
```

### 4.4 RDMA Buffer Manager
```java
package jcifs.internal.smb2.rdma;

import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicLong;

public class RdmaBufferManager {

   * <p><b>Note:</b> {@code a.asSet(d).equals(b.asSet(d))} does not imply {@code a.equals(b)}! For
   * example, {@code a} and {@code b} could be {@code [2..4]} and {@code (1..5)}, or the empty
   * ranges {@code [3..3)} and {@code [4..4)}.
   *
   * <p><b>Warning:</b> Be extremely careful what you do with the {@code asSet} view of a large
   * range set (such as {@code ImmutableRangeSet.of(Range.greaterThan(0))}). Certain operations on

Mark Theunissen <******@****.***> 1760122623 +0200

Dmitri Goutnik <******@****.***> 1676652256 -0500

            } catch (Exception e) {
                log.debug("Error closing channel", e);
            }
        }
        
        channels.clear();
    }
}
```

### 4.4 Channel Load Balancer
```java
package jcifs.internal.smb2.multichannel;

import java.util.*;
import java.util.concurrent.ThreadLocalRandom;

public class ChannelLoadBalancer {

    request concurrency.

 *  **Fix: Lazily initialize the response cache.** This avoids strict mode
    warnings when initializing OkHttp on Android‘s main thread.

 *  **Fix: Disable ALPN on Android 4.4.** That release of the feature was
    unstable and prone to native crashes in the underlying OpenSSL code.
 *  Fix: Don't send both `If-None-Match` and `If-Modified-Since` cache headers
    when both are applicable.

        // Shutdown scheduler
        scheduler.shutdown();
        
        // Close RPC client
        if (rpcClient != null) {
            rpcClient.close();
        }
    }
}
```

### 4.4 Witness RPC Client
```java
package jcifs.internal.witness;

import jcifs.dcerpc.*;
import jcifs.dcerpc.rpc.*;

public class WitnessRpcClient implements AutoCloseable {
    private final DcerpcHandle handle;

  private static final String E21 = "2-1";
  private static final String E13 = "1-3";
  private static final String E31 = "3-1";
  private static final String E34 = "3-4";
  private static final String E44 = "4-4";
  private static final int NODE_COUNT = 20;
  private static final int EDGE_COUNT = 20;
  // TODO(user): Consider adding both error messages from here and {@link AbstractNetworkTest}

	{"$runtime·badmcall(SB)", "$runtime.badmcall(SB)"},
	{"$setg_gcc<>(SB)", "$setg_gcc<>(SB)"},
	{"$~15", "$-16"},
	{"(-64*1024+104)(SP)", "-65432(SP)"},
	{"(0*4)(BP)", "(BP)"},
	{"(1*4)(DI)", "4(DI)"},
	{"(4*4)(BP)", "16(BP)"},
	{"(AX)", "(AX)"},
	{"(BP)(CX*4)", "(BP)(CX*4)"},
	{"(BP*8)", "0(BP*8)"},
	{"(BX)", "(BX)"},
	{"(SP)", "(SP)"},
	{"*AX", "AX"}, // TODO: Should make * illegal here; a simple alias for JMP AX.