code: function finish() {
  		let node,
  			regex = new RegExp( 'mceItemHidden|hidden(((Grammar|Spell)Error)|Suggestion)' ),
  			nodes = editor.dom.select( 'span' ),
  			i = nodes.length;
  
  		while ( i-- ) {
  			// reversed
  			node = nodes[ i ];
  
  			if ( node.className && regex.test( node.className ) ) {
  				editor.dom.remove( node, true );
  			}
  		}
  
  		// Rebuild the DOM so AtD core can find the text nodes
  		editor.setContent( editor.getContent( { format: 'raw' } ), { format: 'raw' } );
  
  		started = false;
  		editor.nodeChanged();
  		editor.fire( 'SpellcheckEnd' );
  	}
docs: Called when the user clicks "Finish" or when no more suggestions left. Removes all remaining spans and fires custom event.