TypeScript on Email Workers

https://github.com/cloudflare/workers-sdk/tree/main/templates/worker-typescript I am using that template as starting point. I want to create email worker. While trying to use TypeScript I had some problems. I can properly assing types of "message" argument in default function of worker. In web editor, I can see autocomplete has message.headers and other stuff. But in local development I only have .from and .to methods. What should I do?