public FileSystem::tempnam($directory, $prefix) Creates

protected FileAccessControlHandler::checkAccess(EntityInterface

public File::setSize($size) Sets the size

file_move(FileInterface $source, $destination = NULL, $replace = FILE_EXISTS_RENAME) Moves a file to a new

public FileSystem::mkdir($uri, $mode = NULL, $recursive = FALSE, $context = NULL)

protected static ManagedFile::fileUsage()

EditorImageDialog::buildForm in

File storage for files. Hierarchy class \Drupal\Core\Entity\

public FileSystemInterface::basename($uri, $suffix = NULL)

protected FileSystem::mkdirCall($uri, $mode, $recursive, $context)