How can I identify the type of variable in Swift. For e.g. if I write 

`struct RandomStruct....` - the type should give me `struct` and not `RandomStruct`

or if I write `class RandomClass...` the type should be `class` and not `RandomClass`.

I have tried using `Mirror.subjectType` and `type(of:)` both of which gives output as `RandomStruct` and `RandomClass`