open fun build(): HtmlUnitDriver
Build the HtmlUnitDriver configured via this builder.
The returned driver will use the configured MockMvc instance for processing any WebRequestMatcher requests and a delegate HtmlUnitDriver for all other requests.
If a delegate has been explicitly configured, it will be used; otherwise, a default WebConnectionHtmlUnitDriver with the BrowserVersion set to CHROME will be configured as the delegate.
Return
the HtmlUnitDriver to use