private void convertIndex(SDField field, ParsedIndex parsed) {
        String indexName = parsed.name();
        Index index = field.getIndex(indexName);
        if (index == null) {
            index = new Index(indexName);
            field.addIndex(index);
        }
        convertIndexSettings(index, parsed);
    }
Helper for converting ParsedField etc. to SDField with settings

@author arnej27959
config-model/src/main/java/com/yahoo/schema/parser/ConvertParsedFields.java