如何使未声明的库自动完成？

How to make autocompletion as in goland? For VSC.

How do I need.

No good.

I have installed packages:

gocode
godef
golint
go-find-references
go-outline
goreturns
gorename
gopkgs
go-symbols

And configured settings.json:

{
    "go.toolsGopath": "/home/user/go",
    "go.gopath": "/home/user/go",
    "go.goroot": "/snap/go/3739",
    "go.buildOnSave": true,
    "go.lintOnSave": true,
    "go.vetOnSave": true,
    "go.buildFlags": [],
    "go.lintFlags": [],
    "go.vetFlags": [],
    "go.useCodeSnippetsOnFunctionSuggest": false,
    "go.formatOnSave": false,
    "go.formatTool": "goreturns"
}

Within VS Code go to the extensions tab and search for "Go". There will be one listed created by Microsoft which provides IntelliSense. Install this extension and restart VS Code, you should have the functionality you are looking for.

Note: you will need to be in a .go file for the IntelliSense to kick in.