public List<Annotations> getAll(String annotationClass) {
        return getAll(new AnnotationClass(annotationClass));
    }
Returns a list of all annotations of the given class that exists in the text. This will also return
all subannotations, even those that override their parents.
If there are none, an empty list is returned, never null. The returned list should not be modified.
container-search/src/main/java/com/yahoo/text/interpretation/Interpretation.java