private void ensureLongsIsMutable() {
            if (!longs_.isModifiable()) {
                longs_ = makeMutableCopy(longs_);
            }
            bitField0_ |= 0x00000001;
        }
Protobuf type {@code im.turms.proto.LongsWithVersion}
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/common/LongsWithVersion.java