public static _Fields findByThriftIdOrThrow(int fieldId) {
        _Fields fields = findByThriftId(fieldId);
        if (fields == null) throw new IllegalArgumentException("Field " + fieldId + " doesn't exist!");
        return fields;
      }
Find the _Fields constant that matches fieldId, throwing an exception
if it is not found.
agent-module/plugins-it/thrift-it/thrift-0-10-it/src/test/java/com/navercorp/pinpoint/it/plugin/thrift/dto/EchoService.java