First time user, can not find instructions about expanding/collapsing under DataView github

[Cuong Nguyen]

Like title said, I would like to create a drop table as a sort of way to view inventory for a company. Functions I would like to have

1. Collapsible data
2. Ability to add a row to the table, and add a nested row to that table.
3. Syncing the grid with SQL to provide values.

Thank you for your help.