Union satisfied by.
type CustomChartsSectionChartsSeriesMetricDefinitionUnion interfaceUnion satisfied by [CustomChartsSectionChartsSeriesMetricDefinitionCustomChartMetricCount], [CustomChartsSectionChartsSeriesMetricDefinitionCustomChartMetricScalar], [CustomChartsSectionChartsSeriesMetricDefinitionCustomChartMetricPercentile] or [CustomChartsSectionChartsSeriesMetricDefinitionCustomChartMetricRatioOutput].