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+<code java>
+package nfs;
+import java.io.InputStream;
+import java.io.OutputStream;
+public class StreamRef {
+	InputStream in;
+	OutputStream out;
+	public StreamRef(InputStream in, OutputStream out){
+		this.in = in;
+		this.out = out;
+	}
+	public InputStream getIn(){
+		return this.in;
+	}
+	public OutputStream getOut(){
+		return out;
+	}
+}
+</code>