Union satisfied by.
type CustomChartsSectionSubSectionsChartsSeriesMetricDefinitionUnion interfaceUnion satisfied by [CustomChartsSectionSubSectionsChartsSeriesMetricDefinitionCustomChartMetricCount], [CustomChartsSectionSubSectionsChartsSeriesMetricDefinitionCustomChartMetricScalar], [CustomChartsSectionSubSectionsChartsSeriesMetricDefinitionCustomChartMetricPercentile] or [CustomChartsSectionSubSectionsChartsSeriesMetricDefinitionCustomChartMetricRatioOutput].