How to send an Isolated object to other task?
This doesn't compile:

class Test{}
auto test = makeIsolated!Test;
send(tid, test.move);

And this also doesn't compile:

receive (
    (Isolated!Test){}
);

Reason is disabled copying of IsolatedRef and it is impossible to store isolated objects in Variant:

Variant test = makeIsolated!Test; // Error: struct vibe.core.concurrency.IsolatedRef!(Test).IsolatedRef is not copyable because it is annotated with @disable