builder.sharedPackages(new String[] {"antlr", "org.antlr"});
JavaExecHandleBuilder javaCommand = builder.getJavaCommand();
javaCommand.setWorkingDir(workingDir);
javaCommand.setMaxHeapSize(spec.getMaxHeapSize());
javaCommand.systemProperty("ANTLR_DO_NOT_EXIT", "true");
javaCommand.redirectErrorStream();
return builder.worker(new AntlrWorkerServer(spec)).build();
}
}