code: @Override
      public GetRuleGroupResult getRuleGroup(GetRuleGroupRequest request) {
          request = beforeClientExecution(request);
          return executeGetRuleGroup(request);
      }
docs: <p>
  Returns the <a>RuleGroup</a> that is specified by the <code>RuleGroupId</code> that you included in the
  <code>GetRuleGroup</code> request.
  </p>
  <p>
  To view the rules in a rule group, use <a>ListActivatedRulesInRuleGroup</a>.
  </p>
  
  @param getRuleGroupRequest
  @return Result of the GetRuleGroup operation returned by the service.
  @throws WAFInternalErrorException
  The operation failed because of a system problem, even though the request was valid. Retry your request.
  @throws WAFNonexistentItemException
  The operation failed because the referenced object doesn't exist.
  @sample AWSWAFRegional.GetRuleGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/waf-regional-2016-11-28/GetRuleGroup" target="_top">AWS API
  Documentation</a>