public static im.turms.client.model.proto.model.user.UserFriendRequest getDefaultInstance() {
        return DEFAULT_INSTANCE;
    }
<code>optional int64 recipient_id = 8;</code>

@return This builder for chaining.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/user/UserFriendRequest.java