docs: function maxDurationMsPerTimelinePx(earliestTimestamp) {
    const durationMsLowerBound = minDurationMsPerTimelinePx();
    const durationMsUpperBound = moment.duration(3, 'days').asMilliseconds();
    const durationMs = availableTimelineDurationMs(earliestTimestamp) / 400.0;
    return clamp(durationMs, durationMsLowerBound, durationMsUpperBound);
  }