Go channels used by the New function

In the itertools.go file, we see that the iterator uses Go channels to range over each element in the collection:

type Iter chan interface{}
func New(els ... interface{}) Iter {
     c := make(Iter)
     go func () {
            for _, el := range els {
                   c <- el
            }
            close(c)
     }()
     return c
}

The New function can be used as follows to take a list of values and turn it into a new iterable collection:

New(3,5,6)