ちなみにfuncをdumpするとシンボルとか見られる

 1> struct S { func f() {} } 2> dump(S.f) - (Function) $R0: (S) -> () -> () = 0x00000001000fca30 $__lldb_expr4`partial apply forwarder for reabstraction thunk helper from @escaping @callee_owned (@in __lldb_expr_1.S) -> (@out @escaping @callee_owned (@in ()) -> (@out ())) to @escaping @callee_owned (@unowned __lldb_expr_1.S) -> (@owned @escaping @callee_owned () -> ()) at repl3-18ad44..swift