private BreakByMetric(IDimension subDimension, MetricMultiplexer metricsTemplate)
{
if (subDimension == null)
throw new ArgumentNullException(nameof(subDimension));
_metricsTemplate = metricsTemplate;
_subDimension = subDimension;
_metricAggregates = new FlexiRow<string, IMetric>(((IMetric)_metricsTemplate).CreateNew);
}
void IResultsAggregator.Begin()
{
_metricMultiplexer = new MetricMultiplexer(_metricTemplates);
_row = new FlexiRow<DimensionValues, IMetric>(() => ((IMetric)_metricMultiplexer).CreateNew());
_dimensionsKeyBuilder = new DimensionsKeyBuilder(_dimensions);
}