How to make a third-party member function as deprecated

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Diagnostics/Syntax Checking

Expected Behaviour

---@deprecated
M.add = M.add

The left one should have marked as deprecated immediately when used such as u:add

Actual Behaviour

1. it not works first.
   
2. and works unexpectedly.
   

Reproduction steps

1. Write the code

-- File A

---@class A
local A = {}

---@param attr string
function A.add(attr)
end

-- File B

---@class A
local B = A

---@deprecated
B.add = A.add

B.add('some attr')

We'll find that B.add havn't marked as deprecated
2. Keep write the followed

-- File C

---@class A
---@field add fun(attr: string)
local C = A

Additional Notes

My original intention was to mark a third-party member function as deprecated.
As there was no straightforward way, I think, to do it, I had to use a lot of tricks, which led to more subsequent problems.

Log File

No response

Commencez par la reproduction avec File A, File B et File C indiquée dans l’issue, en vous concentrant sur la manière dont le diagnostic marque B.add après l’affectation obsolète. Exécutez la reproduction dans l’extension Visual Studio Code et comparez les diagnostics observés avec l’avertissement de dépréciation attendu pour B.add.