public Builder addPrivateConversations(
                int index,
                im.turms.server.common.access.client.dto.model.conversation.PrivateConversation.Builder builderForValue) {
            if (privateConversationsBuilder_ == null) {
                ensurePrivateConversationsIsMutable();
                privateConversations_.add(index, builderForValue.build());
                onChanged();
            } else {
                privateConversationsBuilder_.addMessage(index, builderForValue.build());
            }
            return this;
        }
<code>repeated .im.turms.proto.PrivateConversation private_conversations = 1;</code>
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/conversation/Conversations.java