CEDU never had such a thing, but I have been in a place that used "restraint" and that term was never used.
I'm not exactly sure what the method was called at the place I was. I remember that it was always one-on-one, never more than one staff on a kid, and it only happened if the kid did what was known as "go off", and they would do something such as punch their fist through glass. i.e. it was used as a way to keep the kid from hurting themselves further. It wasn't even used to break up fights, if memory serves. My guess is that it was a derivation from the methods utilized in psych hospitals, albeit sans the ganging up on one kid and putting them in poseys. It was used rarely, although I saw it happen a few times.
It later abandoned the use of restraint. They realized that it could cause further harm than simply letting the kid "run out of gas" and just have their tantrum. I remember reading an article by one of the social workers who stated that the idea of restraint to protect the safety of a kid is a severe misconception and utilizing a "hands off" approach in those situations is essential.
Important to note that this place isn't part of the industry. Never was. Probably why they actually evolve with the kids' well-being in mind.