How to use the @sindresorhus/is.nullOrUndefined function in @sindresorhus/is

if (query) {
		if (!is.string(query)) {
			opts.query = querystring.stringify(query);
		}

		opts.path = `${opts.path.split('?')[0]}?${opts.query}`;
		delete opts.query;
	}

	if (opts.json && is.undefined(opts.headers.accept)) {
		opts.headers.accept = 'application/json';
	}

	const body = opts.body;
	if (is.nullOrUndefined(body)) {
		opts.method = (opts.method || 'GET').toUpperCase();
	} else {
		const headers = opts.headers;
		if (!is.nodeStream(body) && !is.string(body) && !is.buffer(body) && !(opts.form || opts.json)) {
			throw new TypeError('The `body` option must be a stream.Readable, string, Buffer or plain Object');
		}

		const canBodyBeStringified = is.plainObject(body) || is.array(body);
		if ((opts.form || opts.json) && !canBodyBeStringified) {
			throw new TypeError('The `body` option must be a plain Object or Array when the `form` or `json` option is used');
		}

		if (isFormData(body)) {
			// Special case for https://github.com/form-data/form-data
			headers['content-type'] = headers['content-type'] || `multipart/form-data; boundary=${body.getBoundary()}`;
		} else if (opts.form && canBodyBeStringified) {

retries: 2,
			cache: false,
			decompress: true,
			useElectronNet: false,
			throwHttpErrors: true
		},
		url,
		{
			protocol: url.protocol || 'http:' // Override both null/undefined with default protocol
		},
		opts
	);

	const headers = lowercaseKeys(opts.headers);
	for (const key of Object.keys(headers)) {
		if (is.nullOrUndefined(headers[key])) {
			delete headers[key];
		}
	}

	opts.headers = Object.assign({
		'user-agent': `${pkg.name}/${pkg.version} (https://github.com/sindresorhus/got)`
	}, headers);

	if (opts.decompress && is.undefined(opts.headers['accept-encoding'])) {
		opts.headers['accept-encoding'] = 'gzip, deflate';
	}

	const query = opts.query;

	if (query) {
		if (!is.string(query)) {

retries: 2,
			cache: false,
			decompress: true,
			useElectronNet: false,
			throwHttpErrors: true
		},
		url,
		{
			protocol: url.protocol || 'http:' // Override both null/undefined with default protocol
		},
		opts
	);

	const headers = lowercaseKeys(opts.headers);
	for (const key of Object.keys(headers)) {
		if (is.nullOrUndefined(headers[key])) {
			delete headers[key];
		}
	}

	opts.headers = Object.assign({
		'user-agent': `${pkg.name}/${pkg.version} (https://github.com/sindresorhus/got)`
	}, headers);

	if (opts.decompress && is.undefined(opts.headers['accept-encoding'])) {
		opts.headers['accept-encoding'] = 'gzip, deflate';
	}

	const query = opts.query;

	if (query) {
		if (!is.string(query)) {

for (const [key, value] of Object.entries(headers)) {
		if (is.nullOrUndefined(value)) {
			delete headers[key];
		}
	}

	if (options.json && is.undefined(headers.accept)) {
		headers.accept = 'application/json';
	}

	if (options.decompress && is.undefined(headers['accept-encoding'])) {
		headers['accept-encoding'] = 'gzip, deflate';
	}

	const {body} = options;
	if (is.nullOrUndefined(body)) {
		options.method = options.method ? options.method.toUpperCase() : 'GET';
	} else {
		const isObject = is.object(body) && !is.buffer(body) && !is.nodeStream(body);
		if (!is.nodeStream(body) && !is.string(body) && !is.buffer(body) && !(options.form || options.json)) {
			throw new TypeError('The `body` option must be a stream.Readable, string or Buffer');
		}

		if (options.json && !(isObject || is.array(body))) {
			throw new TypeError('The `body` option must be an Object or Array when the `json` option is used');
		}

		if (options.form && !isObject) {
			throw new TypeError('The `body` option must be an Object when the `form` option is used');
		}

		if (isFormData(body)) {

formatArray(arr: Array, depth: number = 0): string {
    const opts =
      depth > 0 && this.opts.childOpts ? this.opts.childOpts : this.opts;
    const braces = this.opts.arrayBraces;
    if (!is.nullOrUndefined(opts.depth) && depth >= opts.depth) {
      return `${braces[0]}Array${braces[1]}`;
    }
    const maxLength = opts.maxArrayLength || 100;

    const output = arr.slice(0, maxLength).map(x => {
      return this.formatValue(x, depth + 1).replace(/\n/g, '\n  ');
    });

    if (arr.length > output.length) {
      output.push('…');
    }
    return this.reduceToSingleString(output, braces);
  }

			...[options.timeout.request, options.timeout.connect].filter((n): n is number => !is.nullOrUndefined(n))
		);

const preNormalize = (options, defaults) => {
	if (is.nullOrUndefined(options.headers)) {
		options.headers = {};
	} else {
		options.headers = lowercaseKeys(options.headers);
	}

	if (options.baseUrl && !options.baseUrl.toString().endsWith('/')) {
		options.baseUrl += '/';
	}

	if (options.stream) {
		options.json = false;
	}

	if (is.nullOrUndefined(options.hooks)) {
		options.hooks = {};
	} else if (!is.object(options.hooks)) {

formatMap(value: Object, depth: number): string {
    const opts =
      depth > 0 && this.opts.childOpts ? this.opts.childOpts : this.opts;
    const braces = this.opts.mapBraces;
    if (!is.nullOrUndefined(opts.depth) && depth >= opts.depth) {
      return `${braces[0]}Object${braces[1]}`;
    }
    const maxLength = opts.maxObjectKeys || 100;
    const keys = Object.keys(value);
    const output = keys.slice(0, maxLength).map(key => {
      const skey = this._stylizeName(String(key));
      const svalue = this.formatValue(value[key], depth + 1).replace(
        /\n/g,
        '\n  '
      );
      return `${skey}: ${svalue}`;
    });
    if (keys.length > output.length) {
      output.push('…');
    }
    return this.reduceToSingleString(output, braces);