[ResourcePriorities] Error in example

Hello!

In example from section 1.4 lazyload is set via setAttribute from js:
assets[i + j].setAttribute('lazyload');
But lazyload attribute is defined readonly in section 4.4.1, so, if I understand the readonly modifier correctly, this statement would at least have no effect on the assets[i + j].

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Regards,
Ivan Kotenkov