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getApplicationDocument example

        $this->writeDocument($this->getInputDefinitionDocument($definition));
    }

    protected function describeCommand(Command $command, array $options = []): void
    {
        $this->writeDocument($this->getCommandDocument($command, $options['short'] ?? false));
    }

    protected function describeApplication(Application $application, array $options = []): void
    {
        $this->writeDocument($this->getApplicationDocument($application, $options['namespace'] ?? null, $options['short'] ?? false));
    }

    /** * Appends document children to parent node. */
    private function appendDocument(\DOMNode $parentNode, \DOMNode $importedParent): void
    {
        foreach ($importedParent->childNodes as $childNode) {
            $parentNode->appendChild($parentNode->ownerDocument->importNode($childNode, true));
        }
    }