code: public VmfsDatastoreOption[] queryVmfsDatastoreExtendOptions(Datastore datastore, String devicePath, Boolean suppressExpandCandidates) throws HostConfigFault, NotFound, RuntimeFault, RemoteException {
          if (datastore == null) {
              throw new IllegalArgumentException("datastore must not be null.");
          }
          return getVimService().queryVmfsDatastoreExtendOptions(getMOR(), datastore.getMOR(), devicePath, suppressExpandCandidates);
      }
docs: SDK4.0 signature