public static List<String> convertClassesToClassNames(List<Class<?>> classes) {
        if (classes == null) {
            return null;
        }
        List<String> classNames = new ArrayList<String>(classes.size());
        for (Class<?> cls : classes) {
            if (cls == null) {
                classNames.add(null);
            } else {
                classNames.add(cls.getName());
            }
        }
        return classNames;
    }
<p>Given a {@code List} of {@code Class} objects, this method converts
them into class names.</p>

<p>A new {@code List} is returned. {@code null} objects will be copied into
the returned list as {@code null}.</p>

@param classes  the classes to change
@return a {@code List} of class names corresponding to the Class objects,
 {@code null} if null input
@throws ClassCastException if {@code classes} contains a non-{@code Class} entry
android/android_framework/base/src/main/java/lang3/ClassUtils.java