code: public FirewallRuleInner createOrUpdateFirewallRule(String resourceGroupName, String accountName, String name, FirewallRuleInner parameters) {
          return createOrUpdateFirewallRuleWithServiceResponseAsync(resourceGroupName, accountName, name, parameters).toBlocking().single().body();
      }
docs: Creates or updates the specified firewall rule.
  
  @param resourceGroupName The name of the Azure resource group that contains the Data Lake Store account.
  @param accountName The name of the Data Lake Store account to which to add the firewall rule.
  @param name The name of the firewall rule to create or update.
  @param parameters Parameters supplied to create the create firewall rule.
  @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.