code: def wrap_passthrough(self, text, multiline=True):
          
          if not multiline:
              text = text.lstrip()
          if multiline:
              out = "\\"
          else:
              out = "\\\\"
          out += self.add_ref("passthrough", text) + unwrapper
          if not multiline:
              out += "\n"
          return out
docs: Wrap a passthrough.