@Override
        public ByteBuffer create(final int depth, final ByteBuffer parentRowKey, final StoredValues storedValues) {
            final long timeMs = storedValueKeyFactory.getTimeMs(storedValues);
            final long groupHash = storedValueKeyFactory.getGroupHash(depth, storedValues);

            final ByteBuffer byteBuffer = byteBufferFactory.acquire(KEY_LENGTH);
            byteBuffer.putLong(timeMs);
            byteBuffer.putLong(groupHash);
            return byteBuffer.flip();
        }
Creates a flat time based group key. <TIME_MS><GROUP_HASH>
stroom-query/stroom-query-common/src/main/java/stroom/query/common/v2/LmdbRowKeyFactoryFactory.java