You don't need another `CraftBukkit start` here. This line is already covered by the start from line [#588](https://github.com/Bukkit/CraftBukkit/pull/1374/files#diff-7381f61780cfa54a4f06bcc8f6b5fa66R588). 

Apparently this function is also missing a CraftBukkit end tag... (for the existing start) Right after the end of the second heal function should be fine. Then you are covering the whole logical area of custom CraftBukkit code. (notice all the event handling happening under your new CraftBukkit end tag.