AppiumDriverLocalService can handle outputStreams

src/main/java/io/appium/java_client/service/local/AppiumDriverLocalService.java

@@ -44,6 +44,7 @@
 import java.time.Duration;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.BiConsumer;
@@ -70,7 +71,7 @@ public final class AppiumDriverLocalService extends DriverService {
     private final ListOutputStream stream = new ListOutputStream().add(System.out);
     private final URL url;
     private String basePath;
-    
+
     private CommandLine process = null;
 
     AppiumDriverLocalService(String ipAddress, File nodeJSExec,
@@ -294,6 +295,16 @@ public void addOutPutStreams(List<OutputStream> outputStreams) {
         }
     }
 
+    /**
+     * Remove the outputStream which is receiving server output data.
+     *
+     * @return the outputStream has been removed if it is present
+     */
+    public Optional<OutputStream> removeOutPutStream(OutputStream outputStream) {
+        checkNotNull(outputStream, "outputStream parameter is NULL!");
+        return stream.remove(outputStream);
+    }
+
     /**
      * Remove all existing server output streams.
      *

src/main/java/io/appium/java_client/service/local/ListOutputStream.java

@@ -20,6 +20,7 @@
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 
 class ListOutputStream extends OutputStream {
 
@@ -30,6 +31,10 @@ ListOutputStream add(OutputStream stream) {
         return this;
     }
 
+    Optional<OutputStream> remove(OutputStream stream) {
+        return streams.remove(stream) ? Optional.of(stream) : Optional.empty();
+    }
+
     @Override public void write(int i) throws IOException {
         for (OutputStream stream : streams) {
             stream.write(i);