isSecureEndpoint(options) {
        if (options) {
            // First check the `secureEndpoint` property explicitly, since this
            // means that a parent `Agent` is "passing through" to this instance.
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            if (typeof options.secureEndpoint === 'boolean') {
                return options.secureEndpoint;
            }
            // If no explicit `secure` endpoint, check if `protocol` property is
            // set. This will usually be the case since using a full string URL
            // or `URL` instance should be the most common usage.
            if (typeof options.protocol === 'string') {
                return options.protocol === 'https:';
            }
        }
        // Finally, if no `protocol` property was set, then fall back to
        // checking the stack trace of the current call stack, and try to
        // detect the "https" module.
        const { stack } = new Error();
        if (typeof stack !== 'string')
            return false;
        return stack
            .split('\n')
            .some((l) => l.indexOf('(https.js:') !== -1 ||
            l.indexOf('node:https:') !== -1);
    }
Determine whether this is an `http` or `https` request.