code: @Override
      public GetParameterHistoryResult getParameterHistory(GetParameterHistoryRequest request) {
          request = beforeClientExecution(request);
          return executeGetParameterHistory(request);
      }
docs: <p>
  Query a list of all parameters used by the AWS account.
  </p>
  
  @param getParameterHistoryRequest
  @return Result of the GetParameterHistory operation returned by the service.
  @throws InternalServerErrorException
  An error occurred on the server side.
  @throws ParameterNotFoundException
  The parameter could not be found. Verify the name and try again.
  @throws InvalidNextTokenException
  The specified token is not valid.
  @throws InvalidKeyIdException
  The query key ID is not valid.
  @sample AWSSimpleSystemsManagement.GetParameterHistory
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ssm-2014-11-06/GetParameterHistory" target="_top">AWS API
  Documentation</a>