@jakesmith This line was added based on the old code:

Please read the old code (line 479, 483, and 484). For x=clusters.ordinality() in line 479, the line 483 sets the 'cluster' to NULL. Then, the line 484 sets the 'clustername' to "SuperFiles" and line 486 to 500 will add an XRefNode using Name= "SuperFiles".