From #109772 (comment)_
Similar to warning for unnecessary suppressions, the trimmer and analyzers can provide a diagnostic that additional annotations are not necessary when a parameter, type parameter, non-public field, or return value of a non-public method has additional annotations that are not required by any target of the value.
From #109772 (comment)_
Similar to warning for unnecessary suppressions, the trimmer and analyzers can provide a diagnostic that additional annotations are not necessary when a parameter, type parameter, non-public field, or return value of a non-public method has additional annotations that are not required by any target of the value.