Instructions for selecting another GC

[Per Nordlöw]

On Friday, 7 June 2019 at 17:57:31 UTC, Per Nordlöw wrote:
> No, I'm talking about being able to select a completely 
> different GC during build time or run-time of my _application_, 
> and not having to rebuild the D compiler.

At 49:09 here

https://www.youtube.com/watch?v=OsOfTVm2ExY&feature=youtu.be&t=2949

Rainzer Schütze mentions the "Open GC Registry". Does he mean 
that another GC can be selected without rebuilding the compiler?