// SPDX-License-Identifier: UNLICENSED pragma solidity =0.7.6; import '../libraries/CallbackValidation.sol'; contract TestCallbackValidation { function verifyCallback( address factory, address tokenA, address tokenB, uint24 fee ) external view returns (IUniswapV3Pool pool) { return CallbackValidation.verifyCallback(factory, tokenA, tokenB, fee); } }