The destructor must be defined in the implementation class so that it
can be called, as Vedant Kumar pointed out in:
'''
What were your thoughts, re:
+class Trace : public PluginInterface {
+public:
+ ~Trace() override = default;
Does this need to be `virtual ~Trace() = ...`?
Otherwise, when a std::shared_ptr<Trace> is destroyed, the
destructor for the derived TraceIntelPT instance won't run.
'''
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