private void checkMatching(ChangeMessageBuilder builder) {
        Matching currentMatching = currentField.getMatching();
        Matching nextMatching = nextField.getMatching();
        if (!currentMatching.equals(nextMatching)) {
            builder.addChange("matching", toString(currentMatching), toString(nextMatching));
        }
    }
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