code: def use_propsfs(self, folder=None, front=False):
          
          if folder is None:
              folder = "/%s/props" % ("Volumes" if platform.system().lower() == "darwin" else "mnt")
          self.add(PropsfsProvider(folder), front=front)
docs: Args:
              folder (str | unicode | None): Optional custom mount folder (defaults to /mnt/props on Linux, and /Volumes/props on OSX)
              front (bool): If True, add provider to front of list