Ok, bear with me, it really wasn't fast!
DS had dropped day feeds himself by18 mo but was still waking a lot and boobing back off. I was more and more tired.
We started reading 'loving comfort, a toddler weaning story'. every day. And talking about Jack, the boy in the book and his mummy and the cuddling etc. Still just boobing and bedsharing on night wakes.
Basically this was preparation and we didn't even try to change anything for over a month.
Then, when it seemed to be having some sort of understanding when we were reading, I offered a cuddle instead on some wakes. Sometimes that and a backstroke/ share bed was enough. Sometimes not. I never tried more than about a minute before boob. Gradually fewer and fewer wakes that needed boob. Still some. Still me bedsharing.
Then about 21 mo, talked about mummy and milkies being so so tired and could we just cuddle instead. He agreed (well as well as a toddler can). So when he woke and asked, gently said mummy and milkies were tired but cuddled/ bedshared.
Didn't ask after 3 nights. Hardly any tears at all. Didn't stop bedsharing, didn't send DH instead. Just stopped boob. Gradually, his sleep improved anyway so it was later and later when he'd wake and I'd hop in with him. Then gradually that has reduced too- he either sleeps through or shouts for teddy/ tuck in and pretty much dismisses me (starts the night night, sleep well, see you in the morning routine phrases)
Then reduced the bedtime feed and stopped. That hadn't put him to sleep since about 11 mo anyway. Maybe about 30s fuss then decided he was more cross about not having a particular book.
It can be done with minimal tears, but has to be gradual and without pushing too hard- it was always more a suggestion than a 'this is what we're doing DS'.