logExposure method
Log exposure for a feature (deduped within session).
Implementation
void logExposure(
String feature,
void Function(GrowthBookExperimentData) logger,
) {
if (_loggedExposures.contains(feature)) return;
final data = _experimentData[feature];
if (data != null) {
_loggedExposures.add(feature);
logger(data);
}
}