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Collects count and latency statistics about RPC calls. Keeps
data for every method.
This uses milliseconds as the standard unit of measure
throughout the class, stored in floats.
Static declaration of histogram buckets.
Must be accessed while holding a lock on methodTimings.
Construct a plugin with custom Ticks and Segmenter implementations.
Construct a plugin with default (system) ticks, and default
Adds timing to the histograms.
Converts nanoseconds to milliseconds.
return elapsedNanos / 1000000.0f;