private void evaluateScenario(Statement base) throws Throwable {
        try {
            base.evaluate();
        } catch (Throwable t) {
            classifyErroredScenarioState(t);
            throw t;
        }

    }
Returns the ScenarioBase instance of this rule
jgiven-junit/src/main/java/com/tngtech/jgiven/junit/JGivenMethodRule.java