src/main/java/org/efaps/ui/wicket/models/objects/UIClassification.java
@SuppressWarnings("unchecked")
    private void expand()
    {
        try {
            final String key = getCacheKey();
            if (Context.getThreadContext().containsSessionAttribute(key)) {
                final Set<UUID> sessMap = (Set<UUID>) Context
                                .getThreadContext().getSessionAttribute(key);
                setExpandedInternal(sessMap.contains(this.classificationUUID));
                for (final UIClassification uiClazz : getDescendants()) {
                    if (sessMap.contains(uiClazz.classificationUUID)) {
                        uiClazz.setExpandedInternal(true);
                    }
                }
            }
        } catch (final EFapsException e) {
            UIClassification.LOG.error("Error reading Session info for UICLassificagtion called by Filed with ID: {}",
                            this.fieldId, e);
        }
    }
@SuppressWarnings("unchecked")
    private void expand()
    {
        try {
            final String key = getCacheKey();
            if (Context.getThreadContext().containsSessionAttribute(key)) {
                final Set<UUID> sessMap = (Set<UUID>) Context
                                .getThreadContext().getSessionAttribute(key);
                setExpandedInternal(sessMap.contains(this.classificationUUID));
                for (final UIClassification uiClazz : getDescendants()) {
                    if (sessMap.contains(uiClazz.classificationUUID)) {
                        uiClazz.setExpandedInternal(true);
                    }
                }
            }
        } catch (final EFapsException e) {
            UIClassification.LOG.error("Error reading Session info for UICLassificagtion called by Filed with ID: {}",
                            this.fieldId, e);
        }
    }
Expand the Tree.