import * as React from 'react' ; import BottomTabBarHeightContext from './BottomTabBarHeightContext' ; export default function useFloatingBottomTabBarHeight ( ) { const height = React . useContext ( BottomTabBarHeightContext ) ; if ( height === undefined ) { throw new Error ( "Couldn't find the bottom tab bar height. Are you inside a screen in Bottom Tab Navigator?" ) ; } return height ; }