AG Grid - Best way to access to the GridApi

Which is the cleanest way to access to the GridApi of the AG Grid:

Option1

import { AgGridNg2 } from 'ag-grid-angular';

@ViewChild('agGrid') agGrid: AgGridNg2;

Option2

Event onGridReady

Answer

The best way is to use onGridReady function and use params.api to assign by your property