in src/main/java/org/apache/sling/junit/performance/runner/PerformanceRunner.java [139:147]
private void validateListenFieldsType(List<Throwable> errors) {
for (FrameworkField field : getTestClass().getAnnotatedFields(Listen.class)) {
if (Listener.class.isAssignableFrom(field.getType())) {
continue;
}
errors.add(new Error("Field " + field.getName() + " should be of type Listener"));
}
}