+ /**
+ * Sets the last known valid message ID for the given buffer.
+ *
+ * This limits LastSeenMsgIds from being set to message IDs in the future, improving performance
+ * when searching for messages in the backlog.
+ *
+ * @see PostgreSqlStorage::setBufferLastSeenMsg()
+ *
+ * @param bufferId[in] ID of the Buffer
+ * @param msgId[in] ID of latest message for this buffer
+ */
+ virtual void setBufferLastMsg(const BufferId &bufferId, const MsgId &msgId);