Data</dt><dd class="cmt"><p>minimum amount of historical measurements required to process percentiles.</p></dd><dt>returns</dt><dd class="cmt"><p>a wrapped error with a useful message, or None if the measured test passed its requirement.</p></dd></dl></div></li><li class="indented0 " name="com.workday.warp.arbiters.PercentageDegradationArbiter#vote" group="Ungrouped" fullComment="yes" data-isabs="false" visbl="pub"><a id="vote[T](ballot:com.workday.warp.arbiters.Ballot,testExecution:T)(implicitevidence$1:co