if (m_container instanceof ObjectType) { ObjectType ot = (ObjectType) m_container; return ot.isKeyProperty(m_name); } else { return false; }
return m_prop.isKeyProperty();
    public boolean isKeyProperty() {        if (m_container instanceof ObjectType) {            ObjectType ot = (ObjectType) m_container;            return ot.isKeyProperty(m_name);        } else {            return false;        }    }