Unsafe, unchecked message-passing with std.concurrency

[Elronnd]

Is there any way to do unsafe, unchecked message-passing using 
std.concurrency's API?  I want to be able to share mutable data 
without having to qualify it as shared.  It looks like the check 
happens in send(), before passing off data to _send(), which does 
no checking; but _send is private.  Is there any analogous 
functionality elsewhere in phobos--send_unchecked or similar?