how to assign to shared obj.systime?

[mw via Digitalmars-d-learn]

```
import std.datetime;

class A {
        SysTime time;
}
void main() {
        shared A a = new A();
        SysTime time;
        a.time = time;
}
```

Error: template std.datetime.systime.SysTime.opAssign cannot 
deduce function from argument types !()(SysTime) shared, 
candidates are:
/usr/include/dmd/phobos/std/datetime/systime.d(659,17):        
opAssign()(auto ref const(SysTime) rhs)