Plastic piece in shower drain line
After using a small sink plunger on our shower drain about every week for a while, I finally ran a small snake a few feet down the line. When I pulled the snake out, there was a plastic funnel looking piece stuck to the end of it that I had pulled out from somewhere. It is about 4 inches long and looks kind of like a vacuum cleaner attachment. It has some text inscribed on the side that says "outside of finish wall between these two lines"
What is this thing? Did I just cause the need for an expensive repair?