export interface ChartsReferenceLineClasses {
  /** Styles applied to the root element. */
  root: string;
  /** Styles applied to the root element if the reference line is vertical. */
  vertical: string;
  /** Styles applied to the root element if the reference line is horizontal. */
  horizontal: string;
  /** Styles applied to the reference line. */
  line: string;
  /** Styles applied to the reference label. */
  label: string;
}
export type ChartsReferenceLineClassKey = keyof ChartsReferenceLineClasses;
export declare function getReferenceLineUtilityClass(slot: string): string;
export declare const referenceLineClasses: ChartsReferenceLineClasses;