code: public GlobusCredential createCredential(X509Certificate[] certs, PrivateKey privateKey, int bits, int lifetime,
          int delegationMode) throws GeneralSecurityException {
          return createCredential(certs, privateKey, bits, lifetime, delegationMode, (X509ExtensionSet) null, null);
      }
docs: Creates a new proxy credential from the specified certificate chain and a private key.
  
  @see #createCredential(X509Certificate[], PrivateKey, int, int, int, X509ExtensionSet, String)
  createCredential
  @deprecated