Duration.toTimeVal ? (following deprecation from 2.066)

[Timothee Cour via Digitalmars-d]

This used to work prior to 2.066 (rc):
Duration t;
auto tv=timeval(t.total!"seconds",t.fracSec.usecs);
now it works but with:
Deprecation: function core.time.Duration.fracSec is deprecated - Please use
split instead.

I see there's a SysTime.toTimeVal but there's no Duration.toTimeVal.
Shouldn't there be?
What would be the new recommended implementation?
Also, I think deprecation messages could be more precise, telling exactly
how to make the change instead of telling you the function name.
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