* \param right The root block of the second Nif tree to merge.
* \param right The root block of the second Nif tree to merge.
* \param version The version of the nif format to use during the clone operation on the right-hand tree. The default is the highest version availiable.
* \param version The version of the nif format to use during the clone operation on the right-hand tree. The default is the highest version availiable.