creationix/node-sdl — comment on commit 709aa22b76cd7f16dcad73f6a65e4d940e1f0a5a
File:  line 0
By rmaz:

the objc headers just declare functions that are used by the objc runtime, to send messages to objects and handle properties and so on. you can see the gory details here:

https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ObjCRuntimeRef/Reference/reference.html