Neos\ContentRepository\Command\NodeCommandControllerPlugin::addMissingDefaultValuesByNodeType PHP Method

    public function addMissingDefaultValuesByNodeType(NodeType $nodeType = null, $workspaceName, $dryRun)
    {
        $addedMissingDefaultValuesCount = 0;
        $nodeTypes = $this->nodeTypeManager->getSubNodeTypes($nodeType->getName(), false);
        $nodeTypes[$nodeType->getName()] = $nodeType;
        if ($this->nodeTypeManager->hasNodeType((string) $nodeType)) {
            $nodeType = $this->nodeTypeManager->getNodeType((string) $nodeType);
            $nodeTypeNames[$nodeType->getName()] = $nodeType;
        } else {
            $this->output->outputLine('Node type "%s" does not exist', array((string) $nodeType));
            exit(1);
        }
        /** @var $nodeType NodeType */
        foreach ($nodeTypes as $nodeTypeName => $nodeType) {
            $defaultValues = $nodeType->getDefaultValuesForProperties();
            foreach ($this->getNodeDataByNodeTypeAndWorkspace($nodeTypeName, $workspaceName) as $nodeData) {
                /** @var NodeData $nodeData */
                $context = $this->nodeFactory->createContextMatchingNodeData($nodeData);
                $node = $this->nodeFactory->createFromNodeData($nodeData, $context);
                if (!$node instanceof NodeInterface) {
                    continue;
                }
                if ($node instanceof Node && !$node->dimensionsAreMatchingTargetDimensionValues()) {
                    if ($node->getNodeData()->getDimensionValues() === []) {
                        $this->output->outputLine('Skipping node %s because it has no dimension values set', [$node->getPath()]);
                    } else {
                        $this->output->outputLine('Skipping node %s because it has invalid dimension values: %s', [$node->getPath(), json_encode($node->getNodeData()->getDimensionValues())]);
                    }
                    continue;
                }
                foreach ($defaultValues as $propertyName => $defaultValue) {
                    if ($propertyName[0] === '_') {
                        continue;
                    }
                    if (!$node->hasProperty($propertyName)) {
                        $addedMissingDefaultValuesCount++;
                        if (!$dryRun) {
                            $node->setProperty($propertyName, $defaultValue);
                            $this->output->outputLine('Set default value for property named "%s" in "%s" (%s)', array($propertyName, $node->getPath(), $node->getNodeType()->getName()));
                        } else {
                            $this->output->outputLine('Found missing default value for property named "%s" in "%s" (%s)', array($propertyName, $node->getPath(), $node->getNodeType()->getName()));
                        }
                    }
                }
            }
        }
        if ($addedMissingDefaultValuesCount !== 0) {
            if ($dryRun === false) {
                $this->persistenceManager->persistAll();
                $this->output->outputLine('Added %s new default values', array($addedMissingDefaultValuesCount));
            } else {
                $this->output->outputLine('%s missing default values need to be set', array($addedMissingDefaultValuesCount));
            }
        }
    }