message: [PanelHeaderSimple] Add getRef prop
diff: @@ -5,10 +5,10 @@ import classNames from '../../lib/classNames';
  import FixedLayout from '../FixedLayout/FixedLayout';
  import Separator from '../Separator/Separator';
  import { ANDROID } from '../../lib/platform';
  -import { HasRootRef } from '../../types/props';
  +import { HasRef, HasRootRef } from '../../types/props';
  import ConfigProviderContext from '../ConfigProvider/ConfigProviderContext';
  -export interface PanelHeaderSimpleProps extends HTMLAttributes<HTMLDivElement>, HasRootRef<HTMLDivElement> {
  +export interface PanelHeaderSimpleProps extends HTMLAttributes<HTMLDivElement>, HasRef<HTMLDivElement>, HasRootRef<HTMLDivElement> {
  left?: ReactNode;
  addon?: ReactNode;
  right?: ReactNode;
  @@ -29,6 +29,7 @@ const PanelHeaderSimple = ({
  separator,
  visor,
  transparent,
  + getRef,
  getRootRef,
  ...restProps
  }: PanelHeaderSimpleProps) => {
  @@ -51,7 +52,7 @@ const PanelHeaderSimple = ({
  }
  ref={getRootRef}
  >
  - <FixedLayout vertical="top" className="PanelHeaderSimple__fixed">
  + <FixedLayout vertical="top" className="PanelHeaderSimple__fixed" getRootRef={getRef}>
  <div className="PanelHeaderSimple__in">
  <div className="PanelHeaderSimple__left">
  <div className="PanelHeaderSimple__left-in">
  