public Builder setCustomBigContentView(RemoteViews contentView) {
            mBigContentView = contentView;
            return this;
        }
Supply custom RemoteViews to use instead of the platform template in the expanded form.
<p>
This will override the expanded layout that would otherwise be constructed by this
Builder object.
<p>
No-op on versions prior to {@link Build.VERSION_CODES#JELLY_BEAN}.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/NotificationCompat.java