Find By alternative solution

[extsoft]

It's possible to use selenium's By.* instead on customs like s(locator, by=By.CSS). So, CSS is default. And if you have to use any other: s("//xpath", By.XPATH).
Also it's possible to make something like that: s(xpath("//xpath")).

[yashaka]

already implemented in more "straightforward" and imho "concise" way:

s(by_xpath("//xpath"))

this is also the same API that Selenide supports now :)