Hi there! I heed help. I use hardhat environment for testing. I heed to test deposite and withdrawing tokens from 3rd party contracts (USDT and BUSD) to my own contract. I want create Mocks that extend SafeERC20, just renamed for USDT and BUSD accordingly. I want testing on hardhat local network (npx hardhat node), how I can do that? Do you know any examples with tests like that?