public int getMemberIdToReadDateCount() {
            return internalGetMemberIdToReadDate().getMap()
                    .size();
        }
<code>int64 group_id = 1;</code>

@return This builder for chaining.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/conversation/GroupConversation.java