Slidable not showing action button using gesture detector tap

[shaon2016]

I am trying to show slidable action button using a button tap. I have found this below function to open but it throws null or nothing happend.

Slidable.of(context)?.open(actionType: SlideActionType.secondary);

How to show action button using on tap?

[letsar]

This is the 0.6 version, I stopped supporting this version.