private void checkNormalization(Schema schema, FieldSet fieldSet) {
        NormalizeLevel.Level normalizing = null;
        for (String fieldName : fieldSet.getFieldNames()) {
            ImmutableSDField field = schema.getField(fieldName);
            NormalizeLevel.Level fieldNorm = field.getNormalizing().getLevel();
            if (normalizing == null) {
                normalizing = fieldNorm;
            } else {
                if ( ! normalizing.equals(fieldNorm)) {
                    warn(schema, field.asField(),
                            "The normalization settings for the fields in " + fieldSet + " are inconsistent " +
                                    "(explicitly or because of field type). This may lead to recall and ranking issues. " +
                                    "See " + fieldSetDocUrl);
                }
            }
        }
    }
Computes the right "index commands" for each fieldset in a search definition.

@author vegardh
@author bratseth
config-model/src/main/java/com/yahoo/schema/processing/FieldSetSettings.java