message: Add the variantType interface.
diff: @@ -392,6 +392,7 @@ TF_CAPI_EXPORT extern void TF_GetInputTensorFromVariable(
  TF_OpKernelContext* ctx,
  int input,
  bool lock_held,
  + bool isVariantType,
  bool sparse,
  void (*copyFunc)(TF_OpKernelContext * ctx,
  TF_Tensor *source,
  