I wonder if it's possible to for the ObjC runtime to randomly obfuscate a processes' "private" selectors on startup, and rewrite ObjC invocations within system

I wonder if it's possible to for the ObjC runtime to randomly obfuscate a processes' "private" selectors on startup, and rewrite ObjC invocations within system frameworks dynamically, to make private API usage harder. Like what ASLR does for memory addresses, but for selectors.