106     typedef otMdnsKey              Key;              ///< Key information.  typedef in ot::Dns::Multicast::Core
342     Error RegisterKey(const Key &aKey, RequestId aRequestId, RegisterCallback aCallback);
366     Error UnregisterKey(const Key &aKey);
612     Error GetNextKey(Iterator &aIterator, Key &aKey, EntryState &aState) const;
954         void  Register(const Key &aKey, const Callback &aCallback);
955         void  Unregister(const Key &aKey);
958         Error CopyKeyInfoTo(Key &aKey, EntryState &aState) const;
1035         Error Init(Instance &aInstance, const Key &aKey) { return Init(aInstance, aKey.mName); }  in Init()
1039         bool  Matches(const Key &aKey) const;
1044         void  Register(const Key &aKey, const Callback &aCallback);
1046         void  Unregister(const Key &aKey);
1055         Error CopyInfoTo(Key &aKey, EntryState &aState) const;
1092         Error Init(Instance &aInstance, const Key &aKey);
1096         bool  Matches(const Key &aKey) const;
1102         void  Register(const Key &aKey, const Callback &aCallback);
1104         void  Unregister(const Key &aKey);
1115         Error CopyInfoTo(Key &aKey, EntryState &aState) const;
1894         Error GetNextKey(Key &aKey, EntryState &aState);
1963     static bool     IsKeyForService(const Key &aKey) { return aKey.mServiceType != nullptr; }  in IsKeyForService()