New core block “classic editor” – What′s the block slug?

With the latest update there′s a new core block, the classic editor. What′s the block slug for the new block?

For example a few block slugs are:
‘core/image’,
‘core/more’,
‘core/paragraph’,
‘core/editor’,
‘core/heading’,
‘core/list’,
‘core/gallery’,
‘core-embed/youtube’,
‘core/audio’,
‘core/html’