private JsonNode getIgnoreCase(String key) {
        String nodeMappingKey = rowAndFieldMapping.getOrDefault(key, key);
        return nodeAndJsonNodeMapping.get(nodeMappingKey);
    }
source data parse to json format
<p>
Date: 2019/12/12
Company: www.dtstack.com

@author maqi
core/src/main/java/com/dtstack/flink/sql/format/dtnest/DtNestRowDeserializationSchema.java