craftbukkit/nms-patches/net/minecraft/world/item/ItemBoneMeal.patch

--- a/net/minecraft/world/item/ItemBoneMeal.java
+++ b/net/minecraft/world/item/ItemBoneMeal.java
@@ -33,6 +33,12 @@
 
     @Override
     public EnumInteractionResult useOn(ItemActionContext itemactioncontext) {
+        // CraftBukkit start - extract bonemeal application logic to separate, static method
+        return applyBonemeal(itemactioncontext);
+    }
+
+    public static EnumInteractionResult applyBonemeal(ItemActionContext itemactioncontext) {
+        // CraftBukkit end
         World world = itemactioncontext.getLevel();
         BlockPosition blockposition = itemactioncontext.getClickedPos();
         BlockPosition blockposition1 = blockposition.relative(itemactioncontext.getClickedFace());