The reason Map String Any does not contain any special symbols specific to that certain type is because it is not a built in special type like the Go map[string

The reason Map String Any does not contain any special symbols specific to that certain type is because it is not a built in special type like the Go map[string]interface{}. It is just a regular type parametrized over two other types. And kinda that is the point - being expressive enough to describe a map type without explicit support.