Merge @module as union type

[latipun7]

In my case, I have two modules that return tables.

moduleA.lua

return { a = 'a', b = { c = 'c' } }

moudleB.lua

return { x = 'x', z = 'zz' }

I want to annotate variable as the union of those two. Is it possible?

---@module 'moduleA'
local a

---@module 'moduleB'
local b

---@type moduleA | moduleB
local c -- I want this variable as union of a & b. = { a = 'a', b = { c = 'c' }, x = 'x', z = 'zz' }

I really need to import the module because that module is from library, so, I don't want to repeat to type all the definition. How to make union type with the modules?

[sewbacca]

Mark them as classes and it should work. I use classes a lot, even just for namespaces.
e.g.

Note that you use dots inside your class names.

[latipun7]

Thank you for your reply.
Yes, it could be done like that. But moduleA & moduleB are 3rd party modules and they didn't set ---@class, I don't want to edit the source file since it would always overwritten when there's update.