Jackalope\NodeType\NodeType::canRemoveNode PHP Method

    public function canRemoveNode($nodeName, $throw = false)
    {
        $childDefs = $this->getChildNodeDefinitions();
        foreach ($childDefs as $child) {
            if ($nodeName === $child->getName() && ($child->isMandatory() || $child->isProtected())) {
                if ($throw) {
                    if ($child->isMandatory()) {
                        $errorMsg = "Can't remove the mandatory childnode: " . $child->getName();
                    } else {
                        $errorMsg = "Can't remove the protected childnode: " . $child->getName();
                    }
                    throw new ConstraintViolationException($errorMsg);
                }
                return false;
            }
        }
        return true;
    }