test WebResourceResponse onCUstom CustomSchemeResponse initialUrl InAppBrowser onCustomScheme print onTargetBlank customSchemes customSchemes__ toJson onCustom schemes schemes_ onDownload resourceCustomSchemes onLoadResourceCustomScheme and return a [Cu encoded in `base64` _ _throwIsNotOpened( _throwIsNotOpened _hand _ChannelManager onDo options initialData assert Level activity.getPreferences(0) Log. com.pichillilorenzo.flutter_inappbrowser flutter_inappbrowser throwIsNotOpened ChannelManager $PROJECT_DIR$/example/android 1536836356751 1536836356751 Android 1.8 flutter_inappbrowser_android Dart SDK