getFeatureEntitlement method
Returns the Entitlement for the given feature key.
Evaluated on-device from the state populated by the last successful
loadEntitlements call — call loadEntitlements first (returns
isEntitled: false, justification: "ENTITLEMENTS_NOT_LOADED" otherwise).
Implementation
Future<Entitlement> getFeatureEntitlement(String featureKey) => _runAction(
() => FronteggPlatform.instance.getFeatureEntitlement(featureKey),
);