@Override
    public final Optional<PARENT> getParent() {
        return Optional.of(parent);
    }
@param <PARENT>  the parent type
@param <THIS>    the type of this class

@author  Emil Forslund
@since   2.3.0
tool-parent/tool-config/src/main/java/com/speedment/tool/config/AbstractChildDocumentProperty.java