How to use the @0x/contracts-erc20.DummyERC20TokenContract.deployFrom0xArtifactAsync function in @0x/contracts-erc20

// Proxies
    const erc20Proxy = await ERC20ProxyContract.deployFrom0xArtifactAsync(
        artifacts.ERC20Proxy,
        provider,
        txDefaults,
        artifacts,
    );
    const erc721Proxy = await ERC721ProxyContract.deployFrom0xArtifactAsync(
        artifacts.ERC721Proxy,
        provider,
        txDefaults,
        artifacts,
    );

    // ZRX
    const zrxToken = await DummyERC20TokenContract.deployFrom0xArtifactAsync(
        artifacts.DummyERC20Token,
        provider,
        txDefaults,
        artifacts,
        '0x Protocol Token',
        'ZRX',
        new BigNumber(18),
        new BigNumber(1000000000000000000000000000),
    );

    // Ether token
    const etherToken = await WETH9Contract.deployFrom0xArtifactAsync(artifacts.WETH9, provider, txDefaults, artifacts);

    // Exchange
    const exchange = await ExchangeContract.deployFrom0xArtifactAsync(
        artifacts.Exchange,

const etherToken = await WETH9Contract.deployFrom0xArtifactAsync(artifacts.WETH9, provider, txDefaults, artifacts);

    // Exchange
    const exchange = await ExchangeContract.deployFrom0xArtifactAsync(
        artifacts.Exchange,
        provider,
        txDefaults,
        artifacts,
        chainId,
    );

    // Dummy ERC20 tokens
    for (const token of erc20TokenInfo) {
        const totalSupply = new BigNumber(1000000000000000000000000000);
        // tslint:disable-next-line:no-unused-variable
        const dummyErc20Token = await DummyERC20TokenContract.deployFrom0xArtifactAsync(
            artifacts.DummyERC20Token,
            provider,
            txDefaults,
            artifacts,
            token.name,
            token.symbol,
            token.decimals,
            totalSupply,
        );
    }

    // ERC721
    // tslint:disable-next-line:no-unused-variable
    const cryptoKittieToken = await DummyERC721TokenContract.deployFrom0xArtifactAsync(
        artifacts.DummyERC721Token,
        provider,

public async deployDummyTokensAsync(
        numberToDeploy: number,
        decimals: BigNumber,
    ): Promise {
        for (let i = 0; i < numberToDeploy; i++) {
            this._dummyTokenContracts.push(
                await DummyERC20TokenContract.deployFrom0xArtifactAsync(
                    erc20Artifacts.DummyERC20Token,
                    this._provider,
                    txDefaults,
                    artifacts,
                    constants.DUMMY_TOKEN_NAME,
                    constants.DUMMY_TOKEN_SYMBOL,
                    decimals,
                    constants.DUMMY_TOKEN_TOTAL_SUPPLY,
                ),
            );
        }
        return this._dummyTokenContracts;
    }
    public async deployProxyAsync(): Promise {