public void init(ConnectionGroup rootGroup) {
        this.rootGroup = (QuickConnectionGroup)rootGroup;
        this.connectionId = new AtomicInteger();
        super.setObjects(this.connections);
        
    }
Initialize the QuickConnectDirectory with the default empty Map for
Connection objects, and the specified ConnectionGroup at the root of
the directory.

@param rootGroup
    A group that should be at the root of this directory.
extensions/guacamole-auth-quickconnect/src/main/java/org/apache/guacamole/auth/quickconnect/QuickConnectDirectory.java