code: public static Collection<X509CRL> getCRLs(X509CRLSelector selector,
                                                boolean signFlag,
                                                PublicKey prevKey,
                                                String provider,
                                                List<CertStore> certStores,
                                                boolean[] reasonsMask,
                                                Set<TrustAnchor> trustAnchors,
                                                Date validity)
          throws CertStoreException
      {
          return getCRLs(selector, signFlag, prevKey, null, provider, certStores,
                         reasonsMask, trustAnchors, validity);
      }
docs: Return the X509CRLs matching this selector. The selector must be
  an X509CRLSelector with certificateChecking set.