function isWebSocketPingEventDeprecatedDeprecateduse Deno.upgradeWebSocket Returns true if input value is a WebSocketPingEvent, false otherwise. import { isWebSocketPingEvent } from "https://dotland.deno.dev/std@0.116.0/ws/mod.ts"; isWebSocketPingEvent(a: WebSocketEvent): a is WebSocketPingEventParametersa: WebSocketEventReturnsa is WebSocketPingEvent