code: public void deleteFirewallRule(String resourceGroupName, String accountName, String firewallRuleName) {
          deleteFirewallRuleWithServiceResponseAsync(resourceGroupName, accountName, firewallRuleName).toBlocking().single().body();
      }
docs: Deletes the specified firewall rule from the specified Data Lake Store account.
  
  @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 from which to delete the firewall rule.
  @param firewallRuleName The name of the firewall rule to delete.
  @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