NativeFinalizer.callback

Dart SDK · dart:ffi

Added NativeFinalizer.callback, an API that returns the finalization callback a NativeFinalizer was created with.

The change makes it possible for a native resource wrapper to detach from a finalizer and invoke the original callback without separately retaining it.

• 43 additions across 4 files
• Landed in the Dart SDK on August 13, 2026
• Commit
• Pull request #64011