method EventEmitter.prototype._addListenerimport { EventEmitter } from "https://deno.land/std@0.95.0/node/events.ts"; _addListener(eventName: string | symbol,listener: GenericFunction | WrappedFunction,prepend: boolean,): thisParameterseventName: string | symbollistener: GenericFunction | WrappedFunctionprepend: booleanReturnsthis