@Override
    public void process(boolean validate, boolean documentsOnly) {
        checkRankModifierRankType(schema);
        addLiteralBoostsToFields(schema);
        reduceFieldLiteralBoosts(schema);
    }
Adds extra search fields and indices to express literal boosts
config-model/src/main/java/com/yahoo/schema/processing/LiteralBoost.java