addCombinator example

if (!count($parts)) {
                    throw new Exception("Missing selector after combinator");
                }
                $first = false;
                $selCombinator = new Node\Combinator;
                $selCombinator->setOperator(
                    $combinator ?: ($filter ? null : " ")
                );
                foreach ($parts as $part) {
                    $selCombinator->addPart($part);
                }
                $group->addCombinator($selCombinator);
            }
            $selector->addGroup($group);
            $this->consumeWhitespaces();
        } while ($this->consume(","));
        return $selector;
    }

    /** * Parses a set of selector pats * * @return array * * @throws Exception */