Script SOP
https://gyazo.com/ac107c8deb36976442b230afd0a506d3
This operation runs a list of scripts whenever it is cooked. This allows you to tie scripts to be performed at certain points in the cooking process. A Script SOP inside a For Each could be used to run a script for every group on an object, for example.
Unlike the Unix SOP, the script is a Python or Hscript and does not modify the actual geometry.
This SOP passes through its input untouched. Adding a Script SOP does not increase memory usage.