thread vscode error juste is normal

[JPLRouge]

hello:

I have no compilation error object, the program works perfectly

my "webview" server "websocket" works perfectly with the possibility of being 
treated like a normal browser

of course I added a lot of function in webview and resize

but errors in vscode

vscode 
    
    
    import websocket ,asynchttpserver,  asyncdispatch
    import threadpool
    import webview
    
    
    proc observer() {.thread} =
          proc cb(req: Request) {.async.} =
    ....
    
    
    
    undeclared identifier: 'cb'
    imported and not used: 'websocket' [UnusedImport]
    
    
    Run

> not probleme doc