This constructor should not be called directly
the URL of the remote MillenniumDB server
the callback that will handle the received data
Private _closingPrivate Readonly _onPrivate Readonly _onPrivate _openPrivate Readonly _pendingPrivate Readonly _wsPrivate _wsPrivate _createCreate the WebSocket instance for the connection
the WebSocket instance
Private _ensurePrivate _safe
The WebSocket connection is the main class that holds a connection between the client and the server