A single operation (create, remove) on an asset group listing group filter.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/services/asset_group_listing_group_filter_service.proto)

| Fields ||
|---|---|
| ## `operation` Union field. The mutate operation. `operation` can be only one of the following: ||
| ### `create` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AssetGroupListingGroupFilter` Create operation: No resource name is expected for the new asset group listing group filter. |
| ### `remove` | `string` Remove operation: A resource name for the removed asset group listing group filter is expected, in this format: `customers/{customer_id}/assetGroupListingGroupFilters/{asset_group_id}~{listing_group_filter_id}` An entity can be removed only if it's not referenced by other parent_listing_group_id. If multiple entities are being deleted, the mutates must be in the correct order. |
| ### `update` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AssetGroupListingGroupFilter` Update operation: The asset group listing group filter is expected to have a valid resource name. |
| ## `update_mask` | `https://protobuf.dev/reference/protobuf/google.protobuf#field-mask` FieldMask that determines which resource fields are modified in an update. |