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set_trace_func

        # Thread.set_trace_func

(from ruby core)
---
    thr.set_trace_func(proc)    -> proc
    thr.set_trace_func(nil)     -> nil

---

Establishes *proc* on *thr* as the handler for tracing, or disables
tracing if the parameter is `nil`.

See Kernel#set_trace_func.



      

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