This is a follow-up issue to SPIGOT-7261.

SPIGOT-7261 implements a event for monitoring natural structure spawning and cancel structures from spawning. However it doesn't allow to edit those structures.

The event described by this ticket should allow to edit the structure after it generated. This is possible (as I found out when working on SPIGOT-7261) but it would mean that this event would be triggered multiple times per structure, depending on how many generation calls it gets.

Having such an event would enable the ability to add extra blocks or modify blocks placed by the generated structure which would probably be useful in some cases and would possibly be a great addition when using it with SPIGOT-7261.

Pull requests related to this ticket: Bukkit and CraftBukkit