Grav\Framework\Flex\Pages\Traits\PageLegacyTrait::getOriginal(): Not Implemented

[matt-j-m]

I am currently using Grav\Common\Page::getOriginal() to compare a page's old/new frontmatter in the onAdminSave event hook. As of 1.7 it seems $event['object'] has changed from an instance of Page to PageObject, which is fine, except that Grav\Framework\Flex\Pages\Traits\PageLegacyTrait::getOriginal() is marked with TODO and simply returns a message saying the method is not implemented. Will this function eventually be available or is there any alternative I could use to determine what a page's existing frontmatter looks like at the time of onAdminSave? Cheers.