This op captures all needed live-in values.
  }];

  let arguments = (ins
    StrAttr:$device
  );

  let results = (outs
    Variadic<AnyType>:$results
  );

  let regions = (region SizedRegion<1>:$body);

  let extraClassDeclaration = [{
    Block &GetBody() { return getOperation()->getRegion(0).front(); }
    bool WrapsSingleOp();
  }];

  let builders = [

    behavior is undefined if any of the operands of the `tf_executor.fetch` is
    dead.
  }];

  let results = (outs
    Variadic<AnyType>:$results
  );

  let regions = (region SizedRegion<1>:$body);

  let extraClassDeclaration = [{
    Block &GetBody() { return getOperation()->getRegion(0).front(); }
    FetchOp GetFetch();
  }];

  let hasCanonicalizer = 1;
}

    DefaultValuedOptionalAttr<StrAttr, "\"\"">:$metadata
  );

  let results = (outs
    TF_VariantTensor:$handle
  );

  let regions = (region SizedRegion<1>:$init,
                        SizedRegion<1>:$next,
                        SizedRegion<1>:$finalize
                        );

  TF_DerivedOperandTypeListAttr Tinit_func_args = TF_DerivedOperandTypeListAttr<0>;

                    TypeArrayAttr:$input_specs,
                    TypeArrayAttr:$output_specs,
                    StrAttr:$logical_kernel);
  let results = (outs Variadic<AnyType>:$outputs);
  let regions = (region SizedRegion<1>:$body);
  let hasVerifier = 1;
}

def quantfork_ReturnOp : quantfork_Op<"return", [Terminator]> {
  let summary = [{
    The `return` operation terminates a quantize region and returns values.
  }];

                    TypeArrayAttr:$input_specs,
                    TypeArrayAttr:$output_specs,
                    StrAttr:$logical_kernel);
  let results = (outs Variadic<AnyType>:$outputs);
  let regions = (region SizedRegion<1>:$body);
  let hasVerifier = 1;
}

def Quantization_ReturnOp : Quantization_Op<"return", [Terminator]> {
  let summary = [{
    The `return` operation terminates a quantize region and returns values.
  }];

    // op.
    DefaultValuedOptionalAttr<BoolAttr, "false">:$is_stateless
  );
  let results = (outs Variadic<AnyTensor>:$output);

  let regions = (region SizedRegion<1>:$cond, SizedRegion<1>:$body);

  let hasVerifier = 1;

  let hasCanonicalizer = 1;
}

def TFL_CallOnceOp : TFL_Op<"call_once", []> {
  let summary = "Invokes an initialization function";