/function command can't find function

Hello,

I've spent the last two days trying to fix an issue:

let's say my new world on minecraft is called "bunny".
then I'd like to create a new function called "feed" in a namespace called "carrot".

According to this snapshot¹ for the version 1.13, where the function commands were last changed, I must put the .mcfunction file to the folder .minecraft/saves/bunny/datapacks/carrot/data/carrot/functions/feed.mcfunction
This will later be callable as carrot:feed

when I excecute the command:

/function carrot:feed

I get the response 

unknown function carrot:feed

What am I doing wrong?
Could anyone upload a world with a working function so it is clear how it all must be allocated?^

Thanks for your help,
Tim

^{1)https://www.minecraft.net/en-us/article/minecraft-snapshot-17w43a}