anchor.diff:  ==== Rollup Job Configuration
   
   The `RollupJobConfig` object contains all the details about the rollup job
  -configuration. See <<Rollup configuration, rollup-job-config>> to learn more
  +configuration. See <<rollup-job-config, Rollup configuration>> to learn more
   about the various configuration settings.
   
   A `RollupJobConfig` requires the following arguments:
  
positive.code: 
  The grouping configuration of the Rollup job is defined in the `RollupJobConfig`
  using a `GroupConfig` instance. `GroupConfig` reflects all the configuration
  settings that can be defined using the REST API. See <<Grouping Config, rollup-groups-config>>
  to learn more about these settings.
  
  Using the REST API, we could define this grouping configuration:
  
negative.code: After defining which groups should be generated for the data, you next configure
  which metrics should be collected. The list of metrics is defined in the `RollupJobConfig`
  using a `List<MetricConfig>` instance. `MetricConfig` reflects all the configuration
  settings that can be defined using the REST API. See <<rollup-metrics-config, Metrics Config>>
  to learn more about these settings.
  
  Using the REST API, we could define this metrics configuration:
  