code: def is_replaceable(self, refobj):
          
          inter = self.get_typ_interface(self.get_typ(refobj))
          return inter.is_replaceable(refobj)
docs: Return whether the given reference of the refobject is replaceable or
          if it should just get deleted and loaded again.
  
          This will call :meth:`ReftypeInterface.is_replaceable`.
  
          :param refobj: the refobject to query
          :type refobj: refobj
          :returns: True, if replaceable
          :rtype: bool
          :raises: None