@Override
        protected void cleanup(String key) {
            connectionMap.remove(key);
        }
Manager which tracks all share keys associated with this connection
record. All share keys registered with this manager will automatically be
removed from the common SharedConnectionMap once the manager is
invalidated.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/tunnel/ActiveConnectionRecord.java