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

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 :

まず tsserver の completion 処理を読み、リンクされている tern-guess-types 機能と比較します。completion パラメータ用のコンテキスト上の変数と関数を返す guesstypes コマンドの範囲を定義し、completion の選択でその結果をどのように使うべきかを検討します。