### Which Cloudflare product does this pertain to? Durable Objects ### Existing documentation URL(s) https://developers.cloudflare.com/durable-objects/api/websockets/#serializeattachments-hahahugoshortcode-s7-hbhb ### What changes are you suggesting? I was not able to make this work at all. I tried at websocket creation ```js const { 0: clientWebSocket, 1: serverWebSocket } = new WebSocketPair(); this.state.acceptWebSocket(serverWebSocket, tags); serverWebSocket.serializeAttachments([value]) ``` and at message reception ```js async webSocketMessage(ws, msg) { ws.serializeAttachments([]) } ``` It always says: ``` serializeAttachments is not a function ``` ### Additional information I'm using last version of wrangler: 3.13.1