Is this the only way to extend a method that yields? Yielding each element provided by the parent?

yielder.php

<?php
/**
 * Obviously this is not real code. Otherwise one could
 * just simply override $multiplier. It is meant to ask
 * if the only way to extend the logic of a generator
 * is re-yielding the yielded elements.
 **/
class Yielder
{
    protected $multiplier = 1;

    public function run()
    {
        foreach (range(1, 10) as $number) {
            yield ($number * $this->multiplier);
        }
    }
}

class Child extends Yielder
{
    public function run()
    {
        $this->multiplier = 2;
        foreach (parent::run() as $number) {
            yield $number;
        }
    }
}

foreach ((new Child())->run() as $number) {
    var_dump($number);
}

/** 
OUTPUTS:

$ php yielder.php
int(2)
int(4)
int(6)
int(8)
int(10)
int(12)
int(14)
int(16)
int(18)
int(20)
*/