Is there a cosmetic procedure where fat is taken out of one part of the body and placed into the breast tissue

I read something about this before. I don't know if this is something new they are testing. I hate the way implants look and I don't like the idea of having something that isn't supposed to be in my body. It seems like if this worked more people would do it. Has anyone had this done?Is there a cosmetic procedure where fat is taken out of one part of the body and placed into the breast tissue
It's in clinical trials now.