private void convertStructField(Schema schema, SDField field, ParsedField parsed) {
        SDField structField = field.getStructField(parsed.name());
        if (structField == null ) {
            throw new IllegalArgumentException("Struct field '" + parsed.name() + "' has not been defined in struct " +
                                               "for field '" + field.getName() + "'.");
        }
        convertCommonFieldSettings(schema, structField, parsed);
    }
Helper for converting ParsedField etc. to SDField with settings

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