implements_repeated
'{0}' can only be implemented once.
Description
#The analyzer produces this diagnostic when a single class is specified more than once in an implements clause.
Example
#The following code produces this diagnostic because A is in the list twice:
dart
class A {}
class B implements A, A {}Common fixes
#Remove all except one occurrence of the class name:
dart
class A {}
class B implements A {}Unless stated otherwise, the documentation on this site reflects Dart 3.8.0. Page last updated on 2025-05-08. View source or report an issue.