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java.util.concurrent.TimeoutException: waitForCallback timed out! at org.chromium.content.browser.test.util.CallbackHelper.waitForCallback(CallbackHelper.java:183) at org.xwalk.test.util.XWalkTestUtilBase.loadDataSync(XWalkTestUtilBase.java:55) at org.xwalk.test.util.XWalkTestUtilBase.loadAssetFile(XWalkTestUtilBase.java:78) at org.xwalk.test.util.XWalkTestUtilBase.loadAssetFileAndWaitForTitle(XWalkTestUtilBase.java:85) at org.xwalk.test.util.RuntimeClientApiTestBase.testExternalExtensionAsync(RuntimeClientApiTestBase.java:310) at org.xwalk.runtime.client.embedded.test.ExternalExtensionTest.testExternalExtensionAsync(ExternalExtensionTest.java:24) at java.lang.reflect.Method.invokeNative(Native Method) at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214) at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199) at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)