Value of Map as nested type

[Bala.FA]

Hello list,

I am working on parquet implementation in Go
(https://github.com/minio/parquet-go),  In Go, its possible to have
map's value as higher level types. For example,

type Person struct {
    Name string
    Age uint32
}

var personMap map[string]Person

By referring 
https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#maps,
I am not able to get know `Person` value type would be defined.
Description in 'LogicialTypes.md' is clean for primitive types.  But I
couldn't able to find how higher level types can be defined as value
in map.

Appreciated for any help on this.

Thanks,

Regards,
Bala