code: function checkSuccess(resp) {
      if (!this.config.successPath) {
        return resp.httpResponse.statusCode < 300;
      }
  
      var r = AWS.util.jamespath.find(this.config.successPath, resp.data);
  
      if (this.config.failureValue &&
          this.config.failureValue.indexOf(r) >= 0) {
        return null; // fast fail
      }
  
      if (this.expectedValue) {
        return r === this.expectedValue;
      } else {
        return r ? true : false;
      }
    }
docs: Checks if the terminal expected success state has been met
  @return [Boolean]