whole_func_string: function insert (b, node, value) {
    return updateNext(b, node, cons(b, value, readNext(b, node)))
  }
func_code_string: function insert (b, node, value) {
    return updateNext(b, node, cons(b, value, readNext(b, node)))
  }
func_documentation_string: insert value into a list after node.