infobox: consistently require non-negative timer durations
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@@ -96,6 +96,7 @@ public class Timer extends InfoBox
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public void setDuration(Duration duration)
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public void setDuration(Duration duration)
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{
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{
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Preconditions.checkArgument(!duration.isNegative(), "negative duration");
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this.duration = duration;
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this.duration = duration;
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endTime = startTime.plus(duration);
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endTime = startTime.plus(duration);
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}
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}
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