code: @Override
      public void releaseConnection() {
          if (apacheHttpResponse != null) {
              try {
                  apacheHttpResponse.close();
                  apacheHttpResponse = null;
              } catch (IOException e) {
                  logger.error("error closing Apache HttpResponse - {}", e);
              }
          }
      }
docs: /* (non-Javadoc)
  @see com.smartsheet.api.internal.http.HttpClient#releaseConnection()