private boolean isClosed()

in flink-connector-elasticsearch-base/src/main/java/org/apache/flink/connector/elasticsearch/sink/ElasticsearchWriter.java [235:240]

• 6 lines of code
• 2 McCabe index (conditional complexity)

    private boolean isClosed() {
        if (closed) {
            LOG.warn("Writer was closed before all records were acknowledged by Elasticsearch.");
        }
        return closed;
    }