getConversionRate static method
Get conversion rate
Implementation
static double getConversionRate(String experimentId, String variantName) {
final impressions = _impressions[experimentId]?[variantName] ?? 0;
final conversions = _conversions[experimentId]?[variantName] ?? 0;
if (impressions == 0) return 0.0;
return conversions / impressions;
}