description

# first property Null safety

E first

Returns the first element.

Throws a StateError if `this` is empty. Otherwise returns the first element in the iteration order, equivalent to `this.elementAt(0)`.

## Implementation

    E get first {
      Iterator<E> it = iterator;
      if (!it.moveNext()) {
        throw IterableElementError.noElement();
      }
      return it.current;
    }