EDIT

import org.vaadin.spring.events.EventScope;

import org.vaadin.spring.events.annotation.EventBusListenerMethod;

import com.vaadin.spring.annotation.SpringComponent;

import com.vaadin.spring.annotation.ViewScope;

import com.vaadin.ui.AbstractField;

        boolean isAddExistingNameRegistration = event.getTarget() != null && event.getTarget().equals(getView().getAddExistingNameCombobox());

        TaxonNamePopupEditor popup = openPopupEditor(TaxonNamePopupEditor.class, event);

        popup.setParentEditorActionContext(event.getContext(), event.getTarget());

        popup.withDeleteButton(!isAddExistingNameRegistration);

        TaxonNamePopupEditorConfig.configureForNomenclaturalAct(popup);

            // allow saving even if the name parts are not valid

            // the user will need to fix this in a later step

            popup.disableMode(TaxonNamePopupEditorMode.VALIDATE_AGAINST_HIGHER_NAME_PART);

        }

        popup.loadInEditor(event.getEntityUuid());

        if(event.hasSource() && event.getSource().isReadOnly()){