https://github.com/swiftlang/swift-corelibs-foundation/blob/0e489e921d7325d220dab368d174d9b7bcb5db75/Sources/Foundation/Thread.swift#L290 if I have a `let thread: Thread = <not the current thread>` and I run ``` t.name = "foo" print(t.name) ``` I will have _set_ `t`'s thread name but I will have read the _calling_ thread's name.