Docstrings for Functions in the Grammar

[Lemour-sudo]

Is there a way to define something similar to docstrings in the Langium grammar?
Such that the lsp can pick it up when I hover over the function in the document and it shows the function's documentation in something like a popup.

[msujew]

Hey @Lemour-sudo,

The default hover provider picks up on JSDoc comments above the respective element automatically:

/** This is some JSDoc */
function test() {}

See also here.