Maybe you should not ever want anybody to do this, since the rest of your package (for example, your Pprof API compatible layer) does not work well when `globalCPUProfiler` is substituted (for example, the registered consumers just lost) or use a non global `ParallelCPUProfiler`. They simply doesn't work at all.     So, instead of suggesting someone to stop a global cpu profiler to create a new global one, you should warn people DO NOT EVER try to replace it.