/// <summary>
/// Initializes a new instance of the <see cref="HitRatioGauge" /> class.
/// </summary>
/// <param name="hitMeter">The numerator meter to use for the ratio.</param>
/// <param name="totalTimer">The denominator timer to use for the ratio.</param>
/// <param name="meterRateFunc">
/// The function to extract a value from the MeterValue. Will be applied to both the numerator
/// and denominator meters.
/// </param>
/// <remarks>
/// Creates a new HitRatioGauge with externally tracked Meter and Timer, and uses the provided meter rate function to
/// extract the value for the ratio.
/// </remarks>
public HitRatioGauge(IMeter hitMeter, ITimer totalTimer, Func <MeterValue, double> meterRateFunc)
: base(() => meterRateFunc(hitMeter.GetValueOrDefault()), () => meterRateFunc(totalTimer.GetValueOrDefault().Rate))
{
}