@java.lang.Override
    public int getSerializedSize() {
        int size = memoizedSize;
        if (size != -1) {
            return size;
        }

        size = 0;
        {
            int dataSize = 0;
            for (int i = 0; i < longs_.size(); i++) {
                dataSize += com.google.protobuf.CodedOutputStream
                        .computeInt64SizeNoTag(longs_.getLong(i));
            }
            size += dataSize;
            if (!getLongsList().isEmpty()) {
                size += 1;
                size += com.google.protobuf.CodedOutputStream.computeInt32SizeNoTag(dataSize);
            }
            longsMemoizedSerializedSize = dataSize;
        }
        if (((bitField0_ & 0x00000001) != 0)) {
            size += com.google.protobuf.CodedOutputStream.computeInt64Size(2, lastUpdatedDate_);
        }
        size += getUnknownFields().getSerializedSize();
        memoizedSize = size;
        return size;
    }
<code>optional int64 last_updated_date = 2;</code>

@return The lastUpdatedDate.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/common/LongsWithVersion.java