get desiredSize() { return closed ? null : 1; },
Amy was born at the same London hospital as Hugo. The medical team behind both births has been building towards this moment for many years.
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Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.