Function create_remotefs_filesystem 

pub fn create_remotefs_filesystem<L>(
    locked: &mut Locked<L>,
    kernel: &Kernel,
    root: &DirectorySynchronousProxy,
    options: FileSystemOptions,
    rights: Flags,
) -> Result<FileSystemHandle, Errno>
where
    L: LockEqualOrBefore<FileOpsCore>,

Create a filesystem to access the content of the fuchsia directory available at fs_src inside pkg.