private void changeInputStream(InputStream in) {
      this.in = in;
    }
This classed is used for keep mlog compatible with that of 0.14 snapshot versions. The element T
will be deserialized from InputStream as format: content data length (4B) + content data (var
length) + validation code (long). The validation code will be filled by a meaningless long value,
and it will be read for no usage.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/logfile/FakeCRC32Deserializer.java