llvm::all_of(op->getResultTypes(), is_not_variant);
  };

  auto is_set_item_legal = [](Operation *op) {
    return op->hasAttr("resize_if_index_out_of_bounds") &&
           op->getAttr("resize_if_index_out_of_bounds")
               .cast<mlir::BoolAttr>()
               .getValue();
  };

  ConversionTarget target(*context);

  let summary = "";

  let arguments = (ins
    TF_VariantTensor:$input_handle,
    TF_Int32Tensor:$index,
    TF_Tensor:$item,

    DefaultValuedOptionalAttr<BoolAttr, "false">:$resize_if_index_out_of_bounds
  );

  let results = (outs
    TF_VariantTensor:$output_handle
  );

  TF_DerivedOperandTypeAttr element_dtype = TF_DerivedOperandTypeAttr<2>;
}