Unknown @-annotations are ignored for function type aliases

[nex3]

Expected Behavior

I would expect unknown @-annotations to show up in the documentation the way they do for other types, like so:

This is particularly useful for writing annotations that are meant to be compatible with TSDoc, like @example.

Actual Behavior

If I write an unknown @-annotation on a type alias whose value is a function:

/**
 * @asdf Some example text
 */
export type Foo = (arg: string) => string;

It doesn't appear in the output:

Steps to reproduce the bug

Just run npx typedoc test.ts on the above code.

Environment

• Typedoc version: 0.22.4
• TypeScript version: 4.3.5
• Node.js version: 16.10.0
• OS: Linux

[Gerrit0]

Oops... that's an easy fix at least. Apparently I didn't realize that Comment always has the tags property, even if there are no tags.