Now that Scrapbooks are going - How do we access global blocks?

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I normally create a Scrapbook entry called missing image then use the following to pull back the file
$block = Block::getByName('Missing_Image');
$block->display():


How does this now work with Stacks or the clipboard, and are stacks the best way to add this? I think it would suit a Global Attribute, but that's not possible.

I did use the scrapbook as a global attribute accessible from the entire site but now they are being phased out whats a dev to do??.

TheRealSean