A collection of performance data captured by the node performance observer.
Is the current node performance observer connected. If it is not connected, then a new one must be created to continue collection under this observer.
The underlying performance observer responsible for collecting metrics.
The original function that was watched. Used by PerformanceApi.unwatch to reinstate the original function when requested.
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Properties of a named function observer that was created with the PerformanceApi.watch function.