import org.gradle.internal.service.scopes.EventScope;
import org.gradle.internal.service.scopes.Scope;

@EventScope(Scope.BuildTree.class)
public interface FeatureFlagListener {
    void flagRead(FeatureFlag flag);

        this.options = options;
        this.broadcaster = listenerManager.getBroadcaster(FeatureFlagListener.class);
    }

    @Override
    public boolean isEnabled(FeatureFlag flag) {
        broadcaster.flagRead(flag);
        if (flag.getSystemPropertyName() != null) {
            // Can explicitly disable property using system property

        def flag = Stub(FeatureFlag)
        flag.systemPropertyName >> propertyName

        when:
        flags.isEnabled(flag)

        then:
        1 * featureFlagListener.flagRead(flag)

        where:
        propertyName << ["prop", null]
    }