@material-ui/core/styles/zIndex.d.ts

export interface ZIndex {
  mobileStepper: number;
  speedDial: number;
  appBar: number;
  drawer: number;
  modal: number;
  snackbar: number;
  tooltip: number;
}

export type ZIndexOptions = Partial<ZIndex>;

declare const zIndex: ZIndex;

export default zIndex;