import_of_non_library
The imported library '{0}' can't have a part-of directive.
Description
#The analyzer produces this diagnostic when a part file is imported into a library.
Example
#Given a part file named part.dart
containing the following:
dart
part of lib;
The following code produces this diagnostic because imported files can't have a part-of directive:
dart
library lib;
import 'part.dart';
Common fixes
#Import the library that contains the part file rather than the part file itself.
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.