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Original file line number Diff line number Diff line change
Expand Up @@ -140,6 +140,8 @@ private String getStringLabelValue(JsonNode jsonNode) {
return String.valueOf(jsonNode.numberValue());
case BOOLEAN:
return String.valueOf(jsonNode.booleanValue());
case NULL:
return NULL_LABEL_VALUE_PLACEHOLDER;
default:
throw new IllegalArgumentException(
String.format("Unsupported JSON node type: %s", jsonNode.getNodeType()));
Expand Down