# GetCallsUsage200Response
## Properties
**since** | Option<**String**> | | [optional]
**until** | Option<**String**> | | [optional]
**group_by** | Option<**GroupBy**> | (enum: day, number, channel, ) | [optional]
**totals** | Option<[**models::GetCallsUsage200ResponseTotals**](GetCallsUsage200ResponseTotals.md)> | | [optional]
**groups** | Option<[**Vec<models::GetCallsUsage200ResponseGroupsInner>**](GetCallsUsage200ResponseGroupsInner.md)> | Present (possibly empty) when `groupBy` is set. | [optional]
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