Can std.conv.toImpl please be deprecated

[Jack Stouffer via Digitalmars-d]

On Sunday, 17 April 2016 at 05:04:46 UTC, H. S. Teoh wrote:
> I'm pretty sure that toImpl being public is an oversight. The 
> name itself implies that it should be private.  I seriously 
> doubt any user code actually calls toImpl directly... shouldn't 
> it be just a matter of marking it private instead?  Do we 
> really need to go through a deprecation cycle for this?

https://github.com/dlang/phobos/pull/4208