Registration of old node classes
Created by: Durman
The code looks does not take into account that an opened file can have multiple node trees with different set of old nodes.
https://discord.com/channels/745273148018262158/806643543182802954/848061828012703794
The function register all old node classes first and then unregister unused of them. My question is what purpose of unregistering of old node classes? It is definitely not going to make performance of the load even better. Probably @ly29 could help.