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See:
          Description
| Interface Summary | |
|---|---|
| StatFunction<T extends Number> | Statistical function that can return a result from any number of input values. | 
| StatsReader | Interface for access to statistics stored in processing context. | 
| Class Summary | |
|---|---|
| Average | Arithmetic average. | 
| Stats | Provides means of monitoring statistics of object processors. | 
| Stats.Reader | The main implementation of StatsReader. | 
| StatsWriter | Writes pipe context parameters to a file (or standard/error output) periodically. | 
| Sum | Sum function. | 
| TimeInterval | Average time interval between calls to add(). | 
Provides classes for tracking statistics of processors.
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