docs: def add_jumpout_site(self, node):
          """
          Add a custom jumpout site.
  
          :param node:    The address of the basic block that control flow leaves during this transition.
          :return:        None
          """
  
          self._register_nodes(True, node)
          self._jumpout_sites.add(node)
          self._add_endpoint(node, 'transition')