method Page.prototype.setUserAgentimport { Page } from "https://dotland.deno.dev/x/fresh@1.7.2/tests/deps.ts"; setUserAgent(userAgent: string, userAgentMetadata?: Protocol.Emulation.UserAgentMetadata): Promise<void>ParametersuserAgent: string Specific user agent to use in this page optionaluserAgentMetadata: Protocol.Emulation.UserAgentMetadata Specific user agent client hint data to use in this page ReturnsPromise<void>Promise which resolves when the user agent is set.