lint/cli/src/test/java/com/android/tools/lint/checks/data/apicheck/attribute2.xml

<ExitText
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:text="Hello"
    android:editTextColor="?android:switchTextAppearance"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />