public void setBackingMap(final Map<String, Map<String, List<Object>>> backingMap) {
        this.backingMap = new LinkedHashMap<>(backingMap);
        this.initializePossibleAttributeNames();
    }
Sets backing map.

@param backingMap the backing map
support/cas-server-support-person-directory-core/src/main/java/org/apereo/cas/persondir/MappablePersonAttributeDao.java