docs: public void prePrepare(Transaction transaction)
                      throws ObjectManagerException
      {
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.entry(this,
                          cclass,
                          "prePrepare",
                          new Object[] { transaction });
  
          // By default does nothing, unless overridden. 
  
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.exit(this
                         , cclass
                         , "prePrepare"
                              );
      }