public Set<Annotation> findFor(AnnotatedElement... elements) {
        if (registry == null) {
            return getQualifiers(elements);
        }
        return QUALIFIER_CACHE.get(elements, registry);
    }
Returns the set of qualifying annotations on the given elements.
@param elements the annotated elements. Null elements are ignored.
@return the set of qualifying annotations on the given elements.
core/src/main/java/org/jdbi/v3/core/qualifier/Qualifiers.java