================
@@ -321,8 +321,15 @@ class LLDB_API SBDebugger {
 
   void SetLoggingCallback(lldb::LogOutputCallback log_callback, void *baton);
 
-  void SetDestroyCallback(lldb::SBDebuggerDestroyCallback destroy_callback,
-                          void *baton);
+  lldb::SBDebuggerDestroyCallbackToken
+  AddDestroyCallback(lldb::SBDebuggerDestroyCallback destroy_callback,
+                     void *baton);
+
+  lldb::SBDebuggerDestroyCallbackToken
+  SetDestroyCallback(lldb::SBDebuggerDestroyCallback destroy_callback,
----------------
jimingham wrote:

Formally, returning the token from SetDestroyCallback is a reasonable addition, 
but it changes the signature of an extant SB API, which we don't allow - we are 
strict about maintaining backwards compatibility of the SB API's.  Since we're 
deprecating this API anyway, I don't think we need to make Set play well with 
the Add/Remove model.  Just leave it returning void.

https://github.com/llvm/llvm-project/pull/89868
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