@Override
    public <DOC extends DocumentProperty & HasMainInterface> Optional<ContextMenu> createContextMenu(TreeCell<DocumentProperty> treeCell, DOC doc) {
        return inner.createContextMenu(treeCell, doc);
    }
Delegated implementation of the {@link ProjectTreeComponent}-interface. This
implementation is concurrent.

@author Per
@since  3.2.0
tool-parent/tool-actions/src/main/java/com/speedment/tool/actions/provider/DelegateProjectTreeComponent.java