In `Collections are Smart Pointers` data is `T` and not `[T]`

[CGMossa]

Hey! Lovely book but in Collections are Smart Pointers there is

struct Vec<T> {
    data: T,
    //..
}

But shouldn't it be like

struct Vec<T> {
  data: [T], 
  // or
  data: RawVec<T>,

Or something like that?