Preselect completion list entries based on contextual type

It should be cool if tsserver could provide a new command `guesstypes` to give the capability to guess parameter types when completion is applied In other word, I would like to support the [same feature that I have done with tern ](https://github.com/angelozerr/tern-guess-types) For instance if you open completion for `document` and select `addEventListener` :  When you apply completion, I would like call a tsserver command 'guesstypes' to retrieve variables, functions for each function parameters. Here a screenshot which shows a list of variable with string type for the `addEventListener` type argument :