Checkboxes not persistent across all pages

Hi,

I'm new to ng2-smart-tables. I want to modify this [example](https://github.com/akveo/ng2-smart-table/blob/master/src/app/pages/examples/various/basic-example-multi-select.component.ts) in the GitHub repo which uses the `selectMode : 'multi' `option to show a column with checkboxes. The checkboxes do show, but every time I use the pagination links to go to another page, the selection is cleared. I tried to find documentation on how to persist the selection across pages, but was not successful. Is there any documentation on this? If not how can I accomplish this? Is there any documentation beyond what's covered at [this link](https://akveo.github.io/ng2-smart-table/#/documentation)?

Thanks for any help.