SeleniumHQ/selenium — pull request #251 by nvreynolds (2014-09-03 22:48:49+00:00)
Title: Adding invisibility of element equivalent

Going from python to ruby I really missed this: https://github.com/nvreynolds/selenium/blob/master/py/selenium/webdriver/support/expected_conditions.py#L159-L177

I know there is resistance to the expected conditions class being added to the ruby bindings so I thought this was the best solution. @jarib