ERC165Impl.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

import {IPool} from "../interfaces/pools/IPool.sol";

import {IERC165} from "../../vendor/IERC165.sol";


abstract contract TokenPool is IPool, OwnerIsCreator, Pausable, IERC165 {
  
  ......

  function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
    return interfaceId == type(IPool).interfaceId || interfaceId == type(IERC165).interfaceId;
  }
}




import {TokenPool} from "./TokenPool.sol";

contract USDCTokenPool is TokenPool {

  ......

  function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
      return
          interfaceId == "USDC" ||
          super.supportsInterface(interfaceId);
  }
}


import {TokenPool} from "./TokenPool.sol";

contract USDCTokenPoolWithSelector is TokenPool {

  ......

  function usdcSpecificFunction() {

  }

  function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
      return
          interfaceId == this.usdcSpecificFunction.selector ||
          super.supportsInterface(interfaceId);
  }
}