buildPathsCompletion example

        if ($input->mustSuggestArgumentValuesFor('name')) {
            $suggestions->suggestValues($this->getAvailableExtensions());
            $suggestions->suggestValues($this->getAvailableBundles());

            return;
        }

        if ($input->mustSuggestArgumentValuesFor('path') && null !== $name = $input->getArgument('name')) {
            try {
                $config = $this->getConfig($this->findExtension($name), $this->compileContainer());
                $paths = array_keys(self::buildPathsCompletion($config));
                $suggestions->suggestValues($paths);
            } catch (LogicException) {
            }
        }

        if ($input->mustSuggestOptionValuesFor('format')) {
            $suggestions->suggestValues($this->getAvailableFormatOptions());
        }
    }

    private function getAvailableExtensions(): array
    {