How to use the @openzeppelin/contract-loader.setupLoader function in @openzeppelin/contract-loader

async function getDeployedERC1820Registry () {
  const config = getSingletonsConfig();
  const loader = setupLoader({
    provider: web3.currentProvider,
    defaultGas: config.defaultGas,
    defaultSender: config.defaultSender,
  });

  if (config.abstraction === 'truffle') {
    const registry = loader.truffle.fromABI(ERC1820_REGISTRY_ABI);
    return registry.at(ERC1820_REGISTRY_ADDRESS);

  } else if (config.abstraction === 'web3') {
    const registry = loader.web3.fromABI(ERC1820_REGISTRY_ABI);
    registry.options.address = ERC1820_REGISTRY_ADDRESS;

    return new web3.eth.Contract(ERC1820_REGISTRY_ABI, ERC1820_REGISTRY_ADDRESS);

  } else {

import { setupLoader } from '@openzeppelin/contract-loader';

import config from './config';
import { defaultSender } from './accounts';
import { provider } from './setup-provider';

if (config.contracts.type !== 'truffle' && config.contracts.type !== 'web3') {
  throw new Error(`Unknown contract type: '${config.contracts.type}'`);
}

export default setupLoader({
  defaultSender,
  defaultGas: config.contracts.defaultGas,
  provider,
})[config.contracts.type];