code: public function closest(string $selectors) {
  		$collection = $this->css($selectors, "ancestor-or-self::");
  
  		return $collection->item(count($collection) - 1);
  	}
docs: Returns the closest ancestor of the current element (or itself)
  which matches the selectors.
  @param string $selectors CSS selector(s)
  @return Element|null