method EventEmitter.prototype.onceWrapimport { EventEmitter } from "https://dotland.deno.dev/x/aleph@v0.3.0-alpha.2/framework/core/events.ts"; onceWrap(eventName: string | symbol, listener: GenericFunction): WrappedFunctionParameterseventName: string | symbollistener: GenericFunctionReturnsWrappedFunction