dump to system.out

[lpxz]

Dear developers,
       I want to print the  information of some structured graph in 
emitHIR() directly to the System.out.
Therefore, I used "Debug.dump(graph, "name")", but it does not print the 
information that I want.
I set the debug and debugsnippet options. The reason seems to be that 
"DebugScope.getInstance()"
  has an empty config instance and therefore lacks the dumpHandlers.

      I tried to copy the code in DebugEnvironment.initialize() to 
manually set the config, but seems there are cyclic project dependency:
printer->Debug->printer.

     Could you give me some hints on achieving the goal. Also, I wonder 
if it is possible to print HIR directly to System.out.
Are there any document explaining the options of graal?

Regards
Peng