code: protected Commandline getCommandline() {
          Commandline cmdl = new Commandline();
          if (configFile != null) {
              cmdl.createArgument().setValue("--config");
              cmdl.createArgument().setFile(configFile);
          }
          if (debug) {
              cmdl.createArgument().setValue("--debug");
          }
          return cmdl;
      }
docs: Get the command line configuration arguments for the
  StaticTraceInstrumentation invocations.
  
  @return the ant Commandline that holds the command line arguments