Class TraceBack not found in code source

I do not find the java TraceBack class (com.axelor.exception.db.TraceBack) in the source code of version 4.1 in the axelor-exception module, whereas in the axelor-exception jar that is downloaded in the site demo official contains a TraceBack class.
Are the jars of the demo not generated from the source code of github?

It is there on https://github.com/axelor/axelor-process-studio/blob/4.1/axelor-exception/src/main/resources/domains/TraceBack.xml.