method Page.prototype.emulateCPUThrottlingimport { Page } from "https://dotland.deno.dev/x/fresh@1.5.2/tests/deps.ts"; emulateCPUThrottling(factor: number | null): Promise<void>Enables CPU throttling to emulate slow CPUs. Enables CPU throttling to emulate slow CPUs. Parametersfactor: number | null slowdown factor (1 is no throttle, 2 is 2x slowdown, etc). ReturnsPromise<void>