public Builder setChannelId(@NonNull String channelId) {
            mChannelId = channelId;
            return this;
        }
Specifies the channel the notification should be delivered on.
<p>
No-op on versions prior to {@link Build.VERSION_CODES#O} .
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/NotificationCompat.java