How to set focus to cell on fin-Hypergird

Using fin-hypergird, I can't see anyway to set focus to a cell.

Need this for 2 behaviours, refocus on a cell after entering a incorrect value, e.g. if a cell can only contain a number between 0 and 2, entering 3 would show an error and refocus on the cell to enter a new value.

Also would like to change the default arrow functionality, so that when you are at of a number, say entering 123 pressing right after the 3 would set focus on the next cell.

Only reference material I can find is:

https://github.com/thomsonreuters/fin-hypergrid

Previously thought cells as links could be used to achieve this, but can't understand how it works