Enum describing possible user list logical rule operators.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/enums/user_list_logical_rule_operator.proto)

| Enums ||
|---|---|
| ## `ALL` | And - all of the operands. |
| ## `ANY` | Or - at least one of the operands. |
| ## `NONE` | Not - none of the operands. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |