code: def show_dropped(self):
          
          ctx = _find_context(self.broker)
          if ctx and ctx.all_files:
              ds = self.broker.get_by_type(datasource)
              vals = []
              for v in ds.values():
                  if isinstance(v, list):
                      vals.extend(d.path for d in v)
                  else:
                      vals.append(v.path)
              dropped = set(ctx.all_files) - set(vals)
              pprint("Dropped Files:", stream=self.stream)
              pprint(dropped, indent=4, stream=self.stream)
docs: Show dropped files