ReadOnlyStream::setUri($uri) Sets

public StreamWrapperManager::register()

public LocalStream::stream_open($uri, $mode, $options, &$opened_path)

public LocalStream::mkdir($uri, $mode, $options)

Defines a Drupal stream wrapper base class for local files. This class provides a complete stream wrapper implementation. URIs such as "public://example

public StreamWrapperInterface::realpath()

public LocalStream::stream_flush() Support

public StreamWrapperManager::unregister()

Visible, readable and writeable. File core/lib/Drupal/Core/StreamWrapper/StreamWrapperInterface.php,

This is the default 'type' falg. This does not include StreamWrapperInterface::LOCAL, because PHP grants a greater trust level to local files (for example, they can be used