is that defined as this and this now I haven't I don't know what these losses are I just assume there are some bounding box losses so when I it's not true when I say understand everything understand the things that are integral to the story of the paper right how exactly they compute bounding box losses at this point I don't care I just assume that there is some loss that I can back propagate right I what is important is that they do this Hungarian matching thing right as soon as I get that I'm like ah that was this you know this um