fix a few things

Author: xadupre

onnx_diagnostic/torch_export_patches/onnx_export_serialization.py

@@ -231,7 +231,7 @@ def serialization_functions(
             )
 
         SlidingWindowCache = get_sliding_window_cache_cls()
-        if SlidingWindowCache:
+        if SlidingWindowCache and SlidingWindowCache.__name__ == "SlidingWindowCache":
             from .serialization.transformers_impl import (
                 flatten_sliding_window_cache,
                 unflatten_sliding_window_cache,

onnx_diagnostic/torch_export_patches/serialization/transformers_impl.py

@@ -220,7 +220,7 @@ def unflatten_static_cache(
 ####################
 
 
-if SlidingWindowCache:
+if SlidingWindowCache and SlidingWindowCache.__name__ == "SlidingWindowCache":
 
     def flatten_sliding_window_cache(
         cache: SlidingWindowCache,