function acceptableDeprecatedDeprecateduse Deno.upgradeWebSocket Returns true if input headers are usable for WebSocket, otherwise false. import { acceptable } from "https://deno.land/std@0.114.0/ws/mod.ts"; Deprecateduse Deno.upgradeWebSocket Returns true if input headers are usable for WebSocket, otherwise false. acceptable(req: { headers: Headers; }): booleanParametersreq: { headers: Headers; }Returnsboolean