// We only match the op with valid "minmax" attribute.
    if (!HasValidMinMaxAttribute(op)) return failure();

    // If all the users of this op have valid "minmax" attributes, it is matched
    // and can be removed.
    auto fakeQuantOp = cast<FakeQuantOp>(op);
    for (auto* operand : fakeQuantOp.getResult().getUsers())
      if (!HasValidMinMaxAttribute(operand)) return failure();

    return success();
  }