/*outfeed_config=*/rewriter.getStringAttr(""));
    rewriter.eraseOp(op);
    return success();
  }
};

// Converts tf.TopKV2 to chlo.top_k.
class ConvertTopKV2Op : public OpRewritePattern<TF::TopKV2Op> {
 public:
  using OpRewritePattern::OpRewritePattern;

  LogicalResult matchAndRewrite(TF::TopKV2Op op,

    backend_config = {
      aggregate_to_topk = true,
      is_fallback = true,
      recall_target = 8.500000e-01 : f32,
      reduction_dim = 1 : i64,
      reduction_input_size_override = -1 : i64,
      top_k = 4 : i64}
    } : (tensor<1x4xf32>, tensor<1x4xi32>, tensor<f32>, tensor<i32>) -> (tensor<1x4xf32>, tensor<1x4xi32>)
  func.return %0#0, %0#1 : tensor<1x4xf32>, tensor<1x4xi32>
}

func.func @topk_v2(%input: tensor<16x16xf32>) -> (tensor<16x8xf32>, tensor<16x8xi32>) {
  %k = "tf.Const"() {value = dense<8> : tensor<i32>} : () -> tensor<i32>

  // CHECK:     chlo.top_k(%[[INPUT]], k = 8)
  %0:2 = "tf.TopKV2"(%input, %k): (tensor<16x16xf32>, tensor<i32>) -> (tensor<16x8xf32>, tensor<16x8xi32>)
  func.return %0#0, %0#1: tensor<16x8xf32>, tensor<16x8xi32>
}

* Add support for setting a `default_response_class` in the `FastAPI` instance or in `include_router`. Initial PR [#467](https://github.com/tiangolo/fastapi/pull/467) by [@toppk](https://github.com/toppk).
* Add support for type annotations using strings and `from __future__ import annotations`. PR [#451](https://github.com/tiangolo/fastapi/pull/451) by [@dmontagu](https://github.com/dmontagu).

## 0.38.1