public YamlDirectoryDiscovery::__construct(array $directories, $file_cache_key_suffix, $key = 'id')
Constructs a YamlDirectoryDiscovery object.
Parameters
array $directories: An array of directories to scan, keyed by the provider. The value can either be a string or an array of strings. The string values should be the path of a directory to scan.
string $file_cache_key_suffix: The file cache key suffix. This should be unique for each type of discovery.
string $key: (optional) The key contained