- `column` - Integer > 0 (default 12) which can change on the fly with `column(N)` API, or `'auto'` for nested grids to size themselves to the parent grid container (to make sub-items are the same size). See [column](http://gridstackjs.com/demo/column.html) and [nested](http://gridstackjs.com/demo/nested.html)

- `class`?: string - additional class on top of '.grid-stack' (which is required for our CSS) to differentiate this instance

- `disableDrag` - disallows dragging of widgets (default: `false`).

- `disableResize` - disallows resizing of widgets (default: `false`).

- `dragIn` - specify the class of items that can be dragged into grids

* example: `dragIn: '.newWidget'`.