text: public virtual RevokeDBSecurityGroupIngressResponse RevokeDBSecurityGroupIngress(RevokeDBSecurityGroupIngressRequest request){var options = new InvokeOptions();options.RequestMarshaller = RevokeDBSecurityGroupIngressRequestMarshaller.Instance;options.ResponseUnmarshaller = RevokeDBSecurityGroupIngressResponseUnmarshaller.Instance;return Invoke<RevokeDBSecurityGroupIngressResponse>(request, options);}