Syntax for map of structs or other maps

[a-urth]

Syntax for map of scalar values is defined in readme and pretty straightforward in form of key: value

But whats the syntax for config with field being map of structs or other maps? Or is it possible in general? Example

type Config struct {
    API map[string]APIConfig `required:"true"`
}

type APIConfig struct {
    Host    string            `required:"true"`
    Headers map[string]string `required:"false"`
}

[a-urth]

Ok, I see, because of how map is parsed its impossible.