Describe the solution you'd like
In Golang, when you usually need to reference a exported function or a nested structure. You have to complete a part first, then type ".", repeat again. e.g.

sli // complete
slices // input .
slices. // complete
slices.Clone()

If it is a multi nested structure, it will be more painful, e.g. A.B.C.D

In Vim, I will map <C-.> to these two steps. When I want to do the same in vscodevim, I found that vscodevim. It does not seem to support <c-.>.