HH\Iterable::lazy
Returns a lazy, access elements only when needed view of the current
Iterable
public function lazy(): Iterable<Tv>;
Normally, memory is allocated for all of the elements of the Iterable.
With a lazy view, memory is allocated for an element only when needed or
used in a calculation like in map() or filter().
Guide
Returns
Iterable<Tv>- anIterablerepresenting the lazy view into the currentIterable.