How do you get the full url for srcset responsive images?

[Slgoetz]

I am trying to get the full URL for the image's srcset during an API call. If I do custom media conversions with specified names I can build my own srcset, but I can't seem to figure out how to return the built in responsive image feature with full URLs or srcset ready.

public function registerMediaCollections(): void{
        $this->addMediaCollection('hero_image')
            ->singleFile()
            ->withResponsiveImages();
}


public function hero_image()
{
    if ($this->hasMedia('hero_image')) {
        return $this->getFirstMedia('hero_image');
    }

}

[garymtate]

I've just found this which might help?

$category->getFirstMedia('category-image')->getSrcset('main')