Service to manage custom interests.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/services/custom_interest_service.proto)
The following methods are available for this service:

- [MutateCustomInterests](https://developers.google.com/google-ads/api/reference/rpc/v26/CustomInterestService/MutateCustomInterests.md.txt)