public Builder setExtras(Bundle extras) {
            mExtras = extras;
            return this;
        }
Set metadata for this notification.

<p>A reference to the Bundle is held for the lifetime of this Builder, and the Bundle's
current contents are copied into the Notification each time {@link #build()} is
called.

<p>Replaces any existing extras values with those from the provided Bundle.
Use {@link #addExtras} to merge in metadata instead.

@see Notification#extras
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/NotificationCompat.java