Generics are not resolved for methods of classes when class is located in a table

[taminomara]

This is adjacent to #453. If I put class in a table, methods won't resolve generic variables declared on a class:

Code:

local ns = {}

--- @class Foo<T>
--- @field current T
ns.Ref = {}

--- @return T
function ns.Ref:get()
    return self.current
end