Source ads product which creates/owns a remarketing list.

| Enums ||
|---|---|
| `REMARKETING_LIST_SOURCE_OTHER` | covers sources not supported in DCM other than those listed below |
| `REMARKETING_LIST_SOURCE_ADX` | ADX |
| `REMARKETING_LIST_SOURCE_DFP` | DFP |
| `REMARKETING_LIST_SOURCE_XFP` | XFP |
| `REMARKETING_LIST_SOURCE_DFA` | DoubleClick Campaign Manager |
| `REMARKETING_LIST_SOURCE_GA` | Google Analytics Premium |
| `REMARKETING_LIST_SOURCE_YOUTUBE` | Youtube |
| `REMARKETING_LIST_SOURCE_DBM` | DoubleClick Bid Manager |
| `REMARKETING_LIST_SOURCE_GPLUS` | G+ |
| `REMARKETING_LIST_SOURCE_DMP` | DoubleClick Audience Center |
| `REMARKETING_LIST_SOURCE_PLAY_STORE` | Playstore |