private void checkStemming(ChangeMessageBuilder builder) {
        Stemming currentStemming = currentField.getStemming(currentSchema);
        Stemming nextStemming = nextField.getStemming(nextSchema);
        if (currentStemming != nextStemming) {
            builder.addChange("stemming", currentStemming.getName(), nextStemming.getName());
        }
    }
Class used to build a message describing the usual field changes causing changes in the indexing script.
This message should be more descriptive for the end-user than just seeing the changed indexing script.

@author geirst
config-model/src/main/java/com/yahoo/vespa/model/application/validation/change/search/IndexingScriptChangeMessageBuilder.java