code: protected long getLogSpaceReserved() {
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.entry(this, cclass
                          , "getLogSpaceReserved"
                            + ")");
  
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.exit(this, cclass
                         , "getLogSpaceReserved"
                         , "returns logSpaceReserved=" + logSpaceReserved + "(long)"
                              );
          return logSpaceReserved;
      }
docs: /*
  Gives the ammount of space this transaction is reserving in the log.
  
  @return long the number of bytes reserved in the log for this transaction.