How to open file from keybindings.json without extensions in vscode?

There are some complex commands that can be invoked with args:

{
    "key": "ctrl+shift+alt+w",
    "command": "vscode.setEditorLayout",
    "args": {
        "orientation": 0,
        "groups": [
            {
                "groups": [
                    {},
                    {}
                ],
                "size": 0.7
            },
            {
                "groups": [
                    {},
                    {}
                ],
                "size": 0.3
            }
        ]
    }
},

vscode.open appears in command autocomplete and therefore should be able to work. But I cannot find what to pass as args for it to work.

https://code.visualstudio.com/api/references/commands

P.S. I know I can use extensions. Just looking if it's possible or not.