/**
* If this node is added by uses, returns original node definition from
* grouping where it was defined.
/**
* If this node is added by uses, returns original node definition from
* grouping where it was defined.
* @return original node definition from grouping if this node is added by
* uses, Optional.absent otherwise
*/
* @return original node definition from grouping if this node is added by
* uses, Optional.absent otherwise
*/