export interface OptionGroupClasses {
  /** Class name applied to the root element. */
  root: string;
  /** State class applied to the root `li` element if `disabled={true}`. */
  disabled: string;
  /** Class name applied to the label element. */
  label: string;
  /** Class name applied to the list element. */
  list: string;
}
export type OptionGroupClassKey = keyof OptionGroupClasses;
export declare function getOptionGroupUtilityClass(slot: string): string;
export declare const optionGroupClasses: OptionGroupClasses;