public float getImportance() {
        return (getSignificance() + getWeight()) / 2;
    }
<p>Returns the average of significance and weight.</p>

<p>As the sum of this number over all the terms of the query is always 1, sums over all fields of
normalized rank features for each field multiplied by this number for the same field will produce a
normalized number.</p>

<p>Note that this scales with the number of matched query terms in the field. If you want a component which does
not, divide by matches.</p>
searchlib/src/main/java/com/yahoo/searchlib/ranking/features/fieldmatch/FieldMatchMetrics.java