What is a sink delegate?

[Steven Schveighoffer via Digitalmars-d-learn]

On 9/30/14 1:22 PM, Gary Willoughby wrote:
> What is a sink delegate?
>
> Discussed here:
> http://forum.dlang.org/thread/m0bdgg$1t7j$1@digitalmars.com?page=6#post-m0emvc:242av5:241:40digitalmars.com
>

Aside from Adam's answer, the term 'sink' means to draw out something, 
as in 'heat sink'. So basically a sink delegate is a place to put the 
string data.

-Steve