typegen not adding map type?

[rcoreilly]

Describe the bug

this did not get the Registers Type added:

// Registers is a list of named strings
//
//types:add
type Registers map[string]string // types:add <- tried here tooo

getting complaints about calling FuncButton methods on this b/c receiver type not registered.

How to reproduce

run latest cogentcode.

Example code

No response

Relevant output

No response

Platform

macOS