https://firebase.google.com/docs/reference/unity/class/firebase/firestore/listener-registration
Firebase.Firestore.ListenerRegistration Class Reference
firebase firestoreclassreference
https://firebase.google.cn/docs/reference/android/com/google/firebase/firestore/ListenerRegistration?authuser=5
ListenerRegistration | Firebase SDKs for Android
firebasesdksandroid
https://access.redhat.com/webassets/avalon/d/red-hat-data-grid/8.3/api/org/infinispan/affinity/ListenerRegistration.html
ListenerRegistration (Infinispan JavaDoc 13.0.10.Final-redhat-00001 API)
infinispanjavadocfinalredhatapi