public static EffectiveStreamKey forLookupTime(final String feed,
                                                   final String streamType,
                                                   final long timeMs) {
        // Create a window of approx 10 days to cache effective streams.
        // First round down the time to the nearest 10 days approx (actually more like 11.5, one billion milliseconds).
        final long fromMs = (timeMs / APPROX_TEN_DAYS) * APPROX_TEN_DAYS;
        final long toMs = fromMs + APPROX_TEN_DAYS;
        return new EffectiveStreamKey(feed, streamType, fromMs, toMs);
    }
Create an {@link EffectiveStreamKey} for a point t

@param feed
@param streamType
@param timeMs
@return
stroom-pipeline/src/main/java/stroom/pipeline/refdata/EffectiveStreamKey.java