Black Trash Bags What Is This Black Trash Bag Installed In The Side Of My Dishwasher?

What is this black trash bag installed in the side of my dishwasher? - black trash bags

I live in an apartment and you do not know what this thing and just broke my dishwasher, but apparently it will be there. Brach, and the W Package / Yellow Material, the diffuse, "says WARNING: To reduce the risk of electrical shock, fire or personal injury to the installer must ensure that the dishwasher is completely closed at the sides and facing up setup time. "What is it? I now need another game?