I find that I can use
Signals.MasterContainerViewController.viewDidLoad

at first p self wouldn’t work yet,
YAY debugging <Signals.MasterViewController: 0x7fc739c11b30>
(lldb) p self
error: <EXPR>:3:1: error: cannot find 'self' in scope
self
^~~~
But if I step a few times to finally get to the Swift code, p self would start working
-> 0x1077a8286 <+38>: call 0x1077a8160 ; Signals.MasterContainerViewController.viewDidLoad() -> () at MasterContainerViewController.swift:42
