CMDHELPER-2996 - Reported by PseudoKnight

https://hub.spigotmc.org/stash/projects/SPIGOT/repos/bukkit/browse/src/main/java/org/bukkit/inventory/meta/BannerMeta.java
https://hub.spigotmc.org/stash/projects/SPIGOT/repos/bukkit/browse/src/main/java/org/bukkit/block/banner

There's also block meta, but that's a separate issue and less critical.

Comment by ezeiger92

This would be really nice to have... I was trying to make a /hat command, and because I can't mess with the banner data, they always end up without patterns.

Comment by PseudoKnight

Someone did this already, but it's yet to be PR'd.
https://github.com/CostethBraes/CommandHelper/commit/cca8523fe725bf687a05184de4147f7746ddce8e