When I copy folded code it just pastes the beginning line (that's visible).
For example if I copy this code when it's folded:
Expanded(
flex: 2,
child: Image(
image: AssetImage('images/dice1.png'),
),
),
It will just paste the starting code:
Expanded(
You have to select also the end of the folded range to successfully copy all the folded content.
See this issue.
A workaround could be to add this line in settings.json:
"editor.foldingStrategy": "indentation"
That would make visible that ending range making it possible for you to select up to it and including it.
Just select and copy up to the next line (after the fold).
in Visual Studio Code
just press ( Ctrl + Shift + [ ) to fold code and ( Ctrl + Shift + Down ) to selected code.
and then copy selected code ( Ctrl + c ).
in mac:
Command = ctrl
Options = alt
