public Builder setSmallIcon(int icon, int level) {
            mNotification.icon = icon;
            mNotification.iconLevel = level;
            return this;
        }
A variant of {@link #setSmallIcon(int) setSmallIcon(int)} that takes an additional
level parameter for when the icon is a {@link android.graphics.drawable.LevelListDrawable
LevelListDrawable}.

@param icon  A resource ID in the application's package of the drawable to use.
@param level The level to use for the icon.
@see android.graphics.drawable.LevelListDrawable
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/NotificationCompat.java