How to use the @ethersproject/hdnode.mnemonicToEntropy function in @ethersproject/hdnode

}

    // the options are optional, so adjust the call as needed
    if (typeof(options) === "function" && !progressCallback) {
        progressCallback = options;
        options = {};
    }
    if (!options) { options = {}; }

    const privateKey: Uint8Array = arrayify(account.privateKey);
    const passwordBytes = getPassword(password);

    let entropy: Uint8Array = null
    let path: string = account.path;
    if (account.mnemonic) {
        entropy = arrayify(mnemonicToEntropy(account.mnemonic));
        if (!path) { path = defaultPath; }
    }

    let client = options.client;
    if (!client) { client = "ethers.js"; }

    // Check/generate the salt
    let salt: Uint8Array = null;
    if (options.salt) {
        salt = arrayify(options.salt);
    } else {
        salt = randomBytes(32);;
    }

    // Override initialization vector
    let iv: Uint8Array = null;

return Promise.reject(e);
    }
    // the options are optional, so adjust the call as needed
    if (typeof (options) === "function" && !progressCallback) {
        progressCallback = options;
        options = {};
    }
    if (!options) {
        options = {};
    }
    var privateKey = bytes_1.arrayify(account.privateKey);
    var passwordBytes = utils_1.getPassword(password);
    var entropy = null;
    var path = account.path;
    if (account.mnemonic) {
        entropy = bytes_1.arrayify(hdnode_1.mnemonicToEntropy(account.mnemonic));
        if (!path) {
            path = hdnode_1.defaultPath;
        }
    }
    var client = options.client;
    if (!client) {
        client = "ethers.js";
    }
    // Check/generate the salt
    var salt = null;
    if (options.salt) {
        salt = bytes_1.arrayify(options.salt);
    }
    else {
        salt = random_1.randomBytes(32);
        ;

return Promise.reject(e);
    }
    // the options are optional, so adjust the call as needed
    if (typeof (options) === "function" && !progressCallback) {
        progressCallback = options;
        options = {};
    }
    if (!options) {
        options = {};
    }
    const privateKey = arrayify(account.privateKey);
    const passwordBytes = getPassword(password);
    let entropy = null;
    let path = account.path;
    if (account.mnemonic) {
        entropy = arrayify(mnemonicToEntropy(account.mnemonic));
        if (!path) {
            path = defaultPath;
        }
    }
    let client = options.client;
    if (!client) {
        client = "ethers.js";
    }
    // Check/generate the salt
    let salt = null;
    if (options.salt) {
        salt = arrayify(options.salt);
    }
    else {
        salt = randomBytes(32);
        ;