I’m still not a fan of the API idiom of accepting a queue on which to run callbacks. There are dangers there… but maybe they’re academic.
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What would you prefer?
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Execute callbacks on “an arbitrary global concurrent queue.”
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Gotcha, so then developers would be responsible for dispatching back to the main queue to update UI in the block.
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Replying to
Sure, or to wherever else: they’re not necessarily updating the UI.