code: public FirewallRuleInner get(String resourceGroupName, String accountName, String firewallRuleName) {
          return getWithServiceResponseAsync(resourceGroupName, accountName, firewallRuleName).toBlocking().single().body();
      }
docs: Gets the specified Data Lake Store firewall rule.
  
  @param resourceGroupName The name of the Azure resource group.
  @param accountName The name of the Data Lake Store account.
  @param firewallRuleName The name of the firewall rule to retrieve.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the FirewallRuleInner object if successful.