vscode snippets: How to link a position in the snippet to a tabstop?

I want to create a snippet that prints the value of a variable for debugging purposes. this is what I came up with:

{
  "Debug": {
    "prefix": ["db"],
    "body": ["console.log("$1 :", $1)"]
  }
}

When I use this snippet cursor goes between the quotes ( | is the cursor position):

console.log("| :",)

And after I typed the name of a variable it copies the name to the second parameter:

console.log("name :", name)

But I can’t use autocompletion in strings. sometimes the variable is an object and auto-completion helps me pick a specific key of the object. I want the cursor to stop in the second parameter so I can use autocompletion:

console.log(" :", |)

How can I do that?