selector = $selector; $this->identifier = \strtolower($identifier); } public function getSelector() : NodeInterface { return $this->selector; } public function getIdentifier() : string { return $this->identifier; } public function getSpecificity() : Specificity { return $this->selector->getSpecificity()->plus(new Specificity(0, 1, 0)); } public function __toString() : string { return \sprintf('%s[%s:%s]', $this->getNodeName(), $this->selector, $this->identifier); } }