react-native-navigation/lib/android/app/src/main/res/values/styles.xml

React Native Navigation - truly native navigation for iOS and Android

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="TopBar" parent="ThemeOverlay.AppCompat.ActionBar">
        <item name="elevation">0dp</item>
    </style>

    <!--The following is a workaround needed to run unit tests in command line-->
    <style name="Widget.Support.CoordinatorLayout" parent="android:Widget">
        @null
    </style>
</resources>