Flip down bathroom sink

I enjoy the great information offered here.
I don't offer any information to the forums because I am a newbie to rvs and don't know anything.
I am looking for some sources to purchase the type of sink that hangs on the wall or sometimes is placed in a wall, and then drops down for use and them folds up to allow additional space in the toilet. I have seen them in rvs.

Thanks for any information or ideas. Bob
RE: Flip down bathroom sink

Thanks for the info Kali. I couldn't remember where I noticed them. Will get in touch with him. Take Care Bob