final MappingMetadata mappingMetadata = indexMappings != null ? indexMappings.get(index) : null;
        if (mappingMetadata == null || mappingMetadata.sourceAsMap().isEmpty()) {
            final AcknowledgedResponse putMappingResponse = fesenClient.get(c -> {
                final String source = FileUtil.readText("mapping/" + mappingName + ".json");