The --packages flag passed to the executable used to run the script in this isolate.
If present, it specifies a file describing how Dart packages are looked up.
Is null if there is no --packages flag.
static String get packageConfig => _Platform.packageConfig;
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-io/Platform/packageConfig.html