In ExtJS 6.2 modern, how do I add a grid paging?

On the documentation for 6.2 it doesn't give details: https://docs.sencha.com/extjs/6.2.0/modern/Ext.grid.plugin.PagingToolbar.html

Following more recent ExtJS documentation I tried:

Ext.define('MyGrid', {
   extend       : 'Ext.grid.Grid',
   store        : 'mystore',
   plugins: {
      pagingtoolbar: true
   },
});

The above gives an error in ExtJS: Error: [Ext.create] Invalid class name or alias 'null' specified, must be a non-empty string.

Please see fiddle: https://fiddle.sencha.com/#view/editor&fiddle/3gmo