---@class with function return question

so I have this (as a mockup):
```lua
do
---@class a
local a = {}

---@generic T
---@param self a
---@param new T
---@return T
a.extend = function(self, new)
--...
return new
end
end
```
and it's supposed to be inheritance for prototypes, right, but I'm trying to make the LS think that it returns the second parameter `new` and it does that and the LS thinks that, so far so good. So this
```lua
local b = a:extend{
n = 1
}
```
will make it like this:
but the problem is, that if I use `---@class b` here, then it will ignore what the function returns and I get this:
am I missing something or is it just not possible? Though, if I separate it into two statements like this,
```lua
---@class b
local b = {
n = 1
}

b = a:extend(b)
```
then I get what I want:
but it's not ideal, since it's two statements now and I can't use the `fun{}` syntactic sugar this way, which would be the whole reason, right. Is there a way to make it work? Also I'm unsure about how to properly word the title here

No source files or tests are named. Reproduce the two inline and two-statement Lua snippets, then trace LuaLS type inference for local declarations, class annotations, generics, and function returns. Done means the supported behavior is implemented and covered by a regression test, or the limitation is clearly documented.

Written by the indexing model from the issue text.