public AllocAdvice getAllocAdvice(TypeID type, Extent bytes, CallSite callsite, AllocAdvice hint) {
public final AllocAdvice getAllocAdvice(Type type, EXTENT bytes, CallSite callsite, AllocAdvice hint) {
  public AllocAdvice getAllocAdvice(TypeID type, Extent bytes,				    CallSite callsite, AllocAdvice hint) {     return null;  }