Wrong documentation about Grid action extension

https://devdocs.prestashop.com/1.7/development/components/grid/tutorials/work-with-row-actions/
Docs are wrong (screenshot 1)

$gridDefinition->getGridActions returns grid actions and not row action.
Row actions are defined in column 'actions', which could be modfied something like this:

• loop through all columns and find action column by id 'actions'
• get column option named 'actions' (it will be RowActionCollection)
• add new action to RowActionCollection by using add() method.

Anyway not only docs needs improvement, but also the code, I wish it is easier to extend, it could be improved to achieve something like:

$grid->getColumnById('action')
    ->getOption('actions')
    ->addAction(new Action)

Screenshots:

Start with the linked Grid row-actions tutorial and compare its screenshot and text with the Grid API described in the issue. Correct the documentation so it distinguishes grid actions from row actions and explains the actions column and RowActionCollection; treat the proposed code API improvement as a separate, broader question because no implementation files or tests are named.