Function free_dart_native_string 

pub unsafe fn free_dart_native_string(s: NonNull<c_char>)

Calls Dart to release memory allocated for the provided native string.

Should be used when Dart cannot release memory in place, e.g. when Rust calls a Dart function returning a native string.

Safety

FREE_DART_NATIVE_STRING function must be registered and the provided pointer must be a valid native string.