text: public virtual UpdateIAMPolicyAssignmentResponse UpdateIAMPolicyAssignment(UpdateIAMPolicyAssignmentRequest request){var options = new InvokeOptions();options.RequestMarshaller = UpdateIAMPolicyAssignmentRequestMarshaller.Instance;options.ResponseUnmarshaller = UpdateIAMPolicyAssignmentResponseUnmarshaller.Instance;return Invoke<UpdateIAMPolicyAssignmentResponse>(request, options);}