Getting issue Angular 9 solution

[SravanthiRedd]

ERROR in ./src/app/map/map.component.ts
"export 'controls' (imported as 'esri') was not found in 'esri-leaflet'

esri.controls.legend([featureLayer], {position: 'topright'}).addTo(this.map);

How should i import the reference to solution
Please help in this issue