How to dynamically update children while preserving the Speed Dial open?

[ozkayas]

What I need is a similar flow like this:
I already searched and read these issues: #220, #259 and #181, tried to implement what is already told.
However can not figure it out.
Tried to set closeManually and visible attributes using setState or ValueNotifiers, can not do it yet.
Am I missing something? Or is this still impossible.