lib/Aegis/Node.php
public function getAttribute(int $index) : ?Node
    {
        return isset($this->attributes[$index]) ? $this->attributes[$index] : null;
    }
public function getAttribute(int $index) : ?Node
    {
        return isset($this->attributes[$index]) ? $this->attributes[$index] : null;
    }
public function getAttribute ( int $ index ) : ? Node { return isset ( $ this -> attributes [ $ index ] ) ? $ this -> attributes [ $ index ] : null ; }
Gets an attribute node

@param int $index
@return Node|null
Gets an attribute node