public static int toDegradation(boolean degradeByMatchPhase, boolean degradedByTimeout, boolean degradedByAdaptiveTimeout) {
        int v = 0;
        if (degradeByMatchPhase) {
            v |= DEGRADED_BY_MATCH_PHASE;
        }
        if (degradedByTimeout) {
            v |= DEGRADED_BY_TIMEOUT;
        }
        if (degradedByAdaptiveTimeout) {
            v |= DEGRADED_BY_ADAPTIVE_TIMEOUT;
        }
        return v;
    }
Carry information about how the query covered the document corpus.
container-core/src/main/java/com/yahoo/container/logging/Coverage.java