@SuppressWarnings("java:S2142")
  @Override
  public boolean hasNext() {
    try {
      return isBlocked().get();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
Fetch ITimeSeriesSchemaInfo from the iterator and return only in the following three cases

<ol>
  <li>successfully fetched an info of normal time series. consumeView is false and next is not
      null.
  <li>successfully fetched batch info of view time series. consumeView is true and next is
      null.
  <li>no more info to be fetched. consumeView is false and next is null.
</ol>
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/read/resp/reader/impl/TimeseriesReaderWithViewFetch.java