It's worth mentioning that the "should""should" prefix can also be used. According to Apple's guideline, not just "can""can" and "should""should", modal verbs in general can be used to name functions that return boolean. I can't see muchmany use of "will""will" but "should""should" is nice for advice inquiring-inquiring hooks, as seen in reactjs:
shouldComponentUpdate: (newProps: any) => boolean