code: public Certificate getCertificate(String thumbprintAlgorithm, String thumbprint) throws BatchErrorException, IOException {
          return getCertificate(thumbprintAlgorithm, thumbprint, null, null);
      }
docs: Gets the specified {@link Certificate}.
  
  @param thumbprintAlgorithm The algorithm used to derive the thumbprint parameter. This must be sha1.
  @param thumbprint The thumbprint of the certificate to get.
  @return A {@link Certificate} containing information about the specified certificate in the Azure Batch account.
  @throws BatchErrorException Exception thrown when an error response is received from the Batch service.
  @throws IOException Exception thrown when there is an error in serialization/deserialization of data sent to/received from the Batch service.