How to use the @material-ui/styles.mergeClasses function in @material-ui/styles

...(native
        ? { id }
        : {
            autoWidth,
            displayEmpty,
            labelId,
            MenuProps,
            onClose,
            onOpen,
            open,
            renderValue,
            SelectDisplayProps: { id, ...SelectDisplayProps },
          }),
      ...inputProps,
      classes: inputProps
        ? mergeClasses({
            baseClasses: classes,
            newClasses: inputProps.classes,
            Component: Select,
          })
        : classes,
      ...(input ? input.props.inputProps : {}),
    },
    ref,
    ...other,
  });
});