The "source" is almost out there. Attaching the debugger to a 64-bit simulator and putting a breakpoint on Apple methods and functions, you can effortlessly rea

The "source" is almost out there. Attaching the debugger to a 64-bit simulator and putting a breakpoint on Apple methods and functions, you can effortlessly read the disassembler code output by lldb/Xcode. I have fixed and learned countless UIKit-related bugs like that.