code: @Override
    public Iterable<JsonObject> convertRecord(JsonArray outputSchema, String inputRecord, WorkUnitState workUnit)
        throws DataConversionException {
      try {
        String strDelimiter = workUnit.getProp(ConfigurationKeys.CONVERTER_CSV_TO_JSON_DELIMITER);
        if (Strings.isNullOrEmpty(strDelimiter)) {
          throw new IllegalArgumentException("Delimiter cannot be empty");
        }
        InputStreamCSVReader reader = new InputStreamCSVReader(inputRecord, strDelimiter.charAt(0),
            workUnit.getProp(ConfigurationKeys.CONVERTER_CSV_TO_JSON_ENCLOSEDCHAR, ConfigurationKeys.DEFAULT_CONVERTER_CSV_TO_JSON_ENCLOSEDCHAR).charAt(0));
        List<String> recordSplit;
        recordSplit = Lists.newArrayList(reader.splitRecord());
        JsonObject outputRecord = new JsonObject();
  
        for (int i = 0; i < outputSchema.size(); i++) {
          if (i < recordSplit.size()) {
            if (recordSplit.get(i) == null) {
              outputRecord.add(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(), JsonNull.INSTANCE);
            } else if (recordSplit.get(i).isEmpty() || recordSplit.get(i).toLowerCase().equals(NULL)) {
              outputRecord.add(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(), JsonNull.INSTANCE);
            } else {
              outputRecord.addProperty(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(), recordSplit.get(i));
            }
          } else {
            outputRecord.add(outputSchema.get(i).getAsJsonObject().get("columnName").getAsString(), JsonNull.INSTANCE);
          }
        }
  
        return new SingleRecordIterable<>(outputRecord);
      } catch (Exception e) {
        throw new DataConversionException(e);
      }
    }
docs: Takes in a record with format String and splits the data based on SOURCE_SCHEMA_DELIMITER
  Uses the inputSchema and the split record to convert the record to a JsonObject
  @return a JsonObject representing the record
  @throws DataConversionException