use_of_native_extension
Dart native extensions are deprecated and aren't available in Dart 2.15.
Description
#The analyzer produces this diagnostic when a library is imported using the dart-ext scheme.
Example
#The following code produces this diagnostic because the native library x is being imported using a scheme of dart-ext:
dart
import 'dart-ext:x';Common fixes
#Rewrite the code to use dart:ffi as a way of invoking the contents of the native library.
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