return packageAndInvoke(obj, methodID, argAddress, expectReturnType, skip4Args, false);
return packageAndInvoke(null, methodID, argAddress, expectReturnType, false, false);
  public static Object invokeWithJValue(Object obj, int methodID, VM_Address argAddress, 					VM_TypeReference expectReturnType, boolean skip4Args)     throws Exception {    return packageAndInvoke(obj, methodID, argAddress, expectReturnType, skip4Args, false);  }