onRenderSuffix prop equivalent for comboBox?

[chrichung]

TextField has a prop for onRenderSuffix where I can render a Spinner component to indicate that a save call is being made. However, comboBox doesn't have something like that from looking at the IComboBoxProps interface. Any idea how I can implement the following for comboBox?

onRenderSuffix: () => { return ( <> {isSubmitting && ( <TooltipHost id="goal-saving-id" content={getLocalizedString(ControlStringConstants.savingButton)} > <Spinner aria-describedby="goal-saving-id" /> </TooltipHost> )} </> ); }

[micahgodbolt]

moved to issue as a feature request.