This class defines some browser management methods:
isChrome()
isFirefox()
isHeadless()
url() - returns current url
source() - returns source HTML code of current page
getWebDriver() - returns the WebDriver instance (created by Selenide automatically or set up by the user), thus giving to the user the raw API to Selenium if needed
setWebDriver(WebDriver) - tells Selenide to use driver created by the user. From this moment the user himself is responsible for closing the driver.
