undefined_prefixed_name

The name '{0}' is being referenced through the prefix '{1}', but it isn't defined in any of the libraries imported using that prefix.

The analyzer produces this diagnostic when a prefixed identifier is found where the prefix is valid, but the identifier isn't declared in any of the libraries imported using that prefix.

The following code produces this diagnostic because dart:core doesn't define anything named a:

import 'dart:core' as p;

void f() {
  p.a;
}

If the library in which the name is declared isn't imported yet, add an import for the library.

除非另有说明，文档之所提及适用于 Dart 3.7.3 版本，本页面最后更新时间: 2025-05-08。 查看文档源码 或者 报告页面问题。