Silly\Application::defaultsViaReflection PHP Метод

    private function defaultsViaReflection($command, $callable)
    {
        if (!is_callable($callable)) {
            return [];
        }
        $function = CallableReflection::create($callable);
        $definition = $command->getDefinition();
        $defaults = [];
        foreach ($function->getParameters() as $parameter) {
            if (!$parameter->isDefaultValueAvailable()) {
                continue;
            }
            if (!$definition->hasArgument($parameter->name) && !$definition->hasOption($parameter->name)) {
                continue;
            }
            $defaults[$parameter->name] = $parameter->getDefaultValue();
        }
        return $defaults;
    }