library/MinkWrapper.php
public function isVisible($sSelector)
    {
        $element = $this->getElement($sSelector, false);
        return $element && $element->isVisible();
    }
public function isVisible($sSelector)
    {
        $element = $this->getElement($sSelector, false);
        return $element && $element->isVisible();
    }
public function isVisible ( $ sSelector ) { $ element = $ this -> getElement ( $ sSelector , false ) ; return $ element && $ element -> isVisible ( ) ; }
Checks if element is visible. If element is not found, waits for it to appear and checks again.

@param string $sSelector
@return bool
Checks if element is visible . If element is not found waits for it to appear and checks again .