apollo-core/src/main/java/com/ctrip/framework/apollo/tracer/internals/cat/CatTransaction.java/CatTransaction/addData
class CatTransaction:  @Override
  public void addData(String key, Object value) {
    try {
      ADD_DATA_WITH_KEY_AND_VALUE.invoke(catTransaction, key, value);
    } catch (Throwable ex) {
      throw new IllegalStateException(ex);
    }
  }