Exemplars are specified as being for Histogram and Counter types, and supported by this client for Histogram and Counter types.
However for custom collectors HistogramMetricFamily supports exemplars, but CounterMetricFamily does not.
Support should be added to CounterMetricFamily.
This shouldn't be too hard, it was added to the underlying layers for HistogramMetricFamily support.
Exemplars are specified as being for Histogram and Counter types, and supported by this client for Histogram and Counter types.
However for custom collectors HistogramMetricFamily supports exemplars, but CounterMetricFamily does not.
Support should be added to CounterMetricFamily.
This shouldn't be too hard, it was added to the underlying layers for HistogramMetricFamily support.