Presses the given key on the given element.
To specify a character and modifier (e.g. ctrl, alt, shift, meta), pass an array for $char with
the modifier as the first element and the character as the second.
For special keys use key constants from WebDriverKeys class.
php
$I->pressKey('#page','a'); // => olda
$I->pressKey('#page',array('ctrl','a'),'new'); //=> new
$I->pressKey('#page',array('shift','111'),'1','x'); //=> old!!!1x
$I->pressKey('descendant-or-self::*[@id='page']','u'); //=> oldu
$I->pressKey('#name', array('ctrl', 'a'), \Facebook\WebDriver\WebDriverKeys::DELETE); //=>''
?>
