# File lib/aws/ec2/network_acl.rb, line 193
      def delete_entry egress_or_ingress, rule_number

        unless [:ingress, :egress].include?(egress_or_ingress)
          msg = "expected :ingress or :egress for egress_or_ingress param"
          raise ArgumentError, msg
        end

        client_opts = {}
        client_opts[:network_acl_id] = network_acl_id
        client_opts[:egress] = egress_or_ingress == :egress
        client_opts[:rule_number] = rule_number

        client.delete_network_acl_entry(client_opts)

        nil

      end